Hey ak0, hard to find the original ADA EPROMs no doubt (and there weren't that many v1.41 EPROM around before ADA ended). MJMP sells direct copies of the EPROMs (copied, not programmed as such) (http://www.marshalljmpmodshop.net/miscellaneous_parts_and_replacement_tubes.htm). v1.41 was for the MP2 (I'm assuming this is the one your after). The EPROM in my MP2 is one that was directly copied from an original EPROM (so identical). v1.41 makes patch changes faster amongst other things. Not sure you can get the code, I spose you could reverse engineer an EPROM or ask A/DA. But unless your really keen to fiddle, I'd pay the 10 euros and get one from MJMP (whom I trust without question). I wouldn't speak for the ebay ones, then I'm not a fan of modern day ebay.