Don't mean to be ignorant or anything, but since the PC and Apple cards are basicly the same - I reckon it would not be much of an effort to create an automated process in order to make EFI-roms.
And I think the hack sceene of PC-cards proves me right. It's not that hard to convert PC-cards into Apple ditos. It would be nice with a greater range of cards for OSX and have all the warranties with it and stuff.
:m0
Official cards have to have a lot more engineering and testing done with them. If there was a market for it then you'd see them available.