mold for miniature pan

I’m having problems trying to figure out a solution to my problem. I’m needing to make 82 1:12 scale miniature “cast iron” frying pans for my club. I’ve unable to find a suitable model and have been working up some out of fimo. I have no idea how is the best way make a 2 part mold & cast them (82 of them!!). I am hoping I could do a black resin in a mold, once I get one made. Any ideas?????