I don't know if you are interested, but I currently have two 707 ROM cards on eBay with a very low reserve of only $5 each. I don't expect there will be a whole lot of bidding on them so you might be able to get them for cheap. These are the cards I have: PSU-100 "NY Synthesis" and PSU-200 "Synthesizer Programs". Hope that helps! The auction ends on the evening of 8/5/99. Regards, Thomas