As it seems all the PBJ's wordpaks work only with Rockewell 6545 CRTCs since they are the only one that seems to support transparent addressing R17/R19/R31. You can get some info here: http://www.6502.org/users/andre/hwinfo/crtc/crtc.html#transparent I quick search on ebay show lots of result, so this should not be a problem at all for the cloning.