FastRAM board with a place for 4M x 16 bit DRAM chip + XC9572 tqfp100 cpld.
DRAM IC is 5 volt KM416C4104C, which could be found on some EDO SIMMs.
It is not yet verified that these will be working, but I think they will.
http://iki.fi/mkl/ram68k/Two (2) printed circuit boards for 15 euros. Shipping (letter post) free.