You could go with vintage Play Doh molds from Ebay. (I literally dug up an old Yoda mold of mine in the yard years back). Looks like they still make some sorts of those, too. Also there are Star Wars cookie cutters.
I’d look for things like jell-o molds and even ice cube trays too. Fortunately George Lucas had no shame or restraint whatsoever when it came to merchandising, so such things should be fairly easy to find.