I'll be using the chips you used: I don't think anyone is interested in anything less than 16 MB modules, and the chips for 4MB are the same price, so there's no reason to go with the smaller capacity SIMM. The only reason I first thought of 4MB modules was that they were the only chips I was able to confirm were actually put on IIfx SIMMs (I just didn't know what to look for and couldn't find pictures until you posted the designs). Finding FPM chips is hard to begin with, and going through datasheets on some unknowns to verify timing is probably impossible.

I believe the strategy for getting the best price will be asking how many SIMMs they can make from a single PCB sheet, and order that many. The less time my project is in their machines the cheaper -- it isn't necessarily a matter of complexity or part volume.

The shop I'm getting a quote from does very elaborate and high density boards, so a few J-lead chips on 4 layer is a cakewalk. I'm sending the gerbers tonight and should be able to get a quote within the week.

Thanks again for posting the design files. I'm consistently surprised and impressed by this community.