Perhaps some electronic guy could take a look at the bus to discover if a 3rd party board could be produced. Someone with one MegaMidgetRacer and the expansion ram could tell us if the ram appears as a different board or as the same board. Perhaps it's just a "normal" autoconfig board with 32bit access to the ram and NedoPC's design can be modified to work with 32bits and that bus.
But I guess that wouldn't be possible without a lot of experience and knowledge about electronics
