Well, a super-soaker filled with holy water would reasonably be able to be obtained by your character. With a bit of effort, syringes can be obtained, or at least those under-the-skin turkey baster devices, both of which could be loaded with the holy water. If you can’t get the syringes or injection devices, bribe the GM with a plateful of brownies, and see if you can get some DMSO added to the holy water without it losing its magical properties. The DMSO allows instantaneous absorbtion of the holy water into the skin, causing lotsa damage immediately.
If you cant’ get that stuff, and your GM is a hard-liner, you can always go buy an assortment of Nerf balls, and soak them in holy water. The water gives the balls more distance as you throw them, plus if you miss, there’s always the chance of splashing damage, and holy-water burns to the legs usually slow down the vampires enough so that you may hit them dead-on with another shot.
The last with water – If all else fails, you can go to a specialty glass store, and you can buy bottles that are fairly thin glass. Then, if you go to Home Depot, you can buy 6-foot wooden dowels, and some duct tape. You put the holy water in the bottle, put the dowel in the hole (tight fitting dowels!) and then duct-tape them together. You can then use it like a club to smash at the vampire, which shatters the bottle, dousing it. You don’t want to use regular beer bottles, as they are sometimes too thick to shatter.
Now, if you want to get esoteric, AND you have properly bribed your GM… You know those cans of air that you use to blow the dust out of your keyboard/computer? Well, in their liquid state, they could conceivably be called a fluid, and they COULD hold a “holy blessing” charge. If you invert the cans, the liquid shoots out, and you can get a decent range on some of the cans. Secondly, if you are close enough, you also get the freezing damage inherent from the liquid. Go for the eyes! But then, if the vampire is close enough for you to spray it, its probably too late anyway.
Wooden knives can easily be obtained at almost any given mall around you that specializes in African or South American kitch. You know - the ones that sell the nifty tapestries, carved wood statues, wooden animals, etc. (Around here, I can think of four within a 20 mile radius). They usually have a section of faux spears and knives made out of ironwood. Barring that, they have large-size elephant sculptures, from which you can break off a tusk. If you can’t get that, then a good specialty carpentry store can sell the stronger imported woods, which you can sharpen to get both the stake effect, and possibly a cutting-edge to use as a weapon.
With Fire, one of the best things to do, for both comedic effect and result, is to use cans of Silly String. If you buy the good kind, you can get like 10 to 15 feet of launch for the string. In games I’ve played, it serves to make both the GM laugh (which is never a bad thing), and once it made the vampire laugh itself silly by realizing we were attacking it with silly string. This made it slow down. Then, when we threw the lighter at it, and the string exploded in a large ball of flame, he wasn’t laughing much more.
Finally, like in the movie Blade, a full-spectrum flashlight bulb could do some damage, depending on the type of vampire. If you shine it on them, and nothing happens, then you can still run away - of course, making sure to do the typical throw-the-flashlight-at-the-vampire, run away screaming, and break a heel and tripping maneuver. One must keep with the rules of b-grade horror movies, after all.
(jeez. Did you ever have one of those moments that just makes you realize how geeky you are? I need to get out more often)