MsRobyn, I’m not making a pie, so buying a pie crust would be a waste of time - I’d have to crush it, too. I’m making a mousse cake, which is made in a large springform pan and has several layers of these crushed cookies, much like an ice cream cake.
I use oreos for my cheesecake crust. Oreos, butter, and hazelnuts all into the food processor. press into a springform pan, bake 10 minutes, fill with cheesecake… or not 
Ah, okay. I misunderstood; I thought you were making mousse pie.
You still want the Nabisco Famous Chocolate wafers.
Robin
I think I know what you are making. We have a recipe that’s similar, but we roll it so it looks like a jelly roll - and yep, it uses the Nabisco Famous Chocolate Wafers.
Just got the email back from my my mother, ans shes says they’re “Christie Chocolate Wafers”
Christie is a division of Nabisco Brands, at least here in Canada, so we have a consensus.
I’ve also found a cake recipe that uses Christie wafers, and it looks like they’re the ones I (and I believe the rest of us) have in mind:
http://www.foodtv.ca/feature/ontheburner/2003_07_02/article3.asp
That looks like it. I mistakenly said we rolled ours, but it’s more like a loaf. It’s damn good too.
don’t know about stores and their generic brands out your way, but up here in Virginia one of the larger chains (can’t remember if it was Giant or Safeway) made a home-label chocolate-flavored animal cracker-type cookie. my mom had been trying to find a cookie source for making chocolate cookie crumbs and happened to see the box when she was visiting. she was dumbfounded by such a simple solution. YMMV, of course. but any plain chocolate-flavored sugar cookie would probably work.
I bet it was Hydrox cookies, NO?
Nope. No filling in the ones I need. I hate Hydrox, by the way - they’re sub-par Oreo ripoffs of DOOM.
Apparently they are the Nabisco Famous Chocolate, which will make the search easier. I will also look into chocolate animal crackers.