I think we bought up the last of the Micromac stock not too long ago.  Hans Strupat is the current owner, and nearly everything of value has been sold.  He has a few bits and bobs.

If you'd like to call him and ask, PM me and I'll give you his contact info.  I think he still has a few not-rare accelerators, and some actually very useful IIfx SIMM doublers.  So if you have some smaller SIMMs, you can double them up on each of the IIfx's RAM slots for even more RAM.