The E version is the European version. I don't know if you can swap them but there is an E version re manufactured on Ebay at the moment. Not something I would normally purchase by choice but if a new one is not obtainable then this gets the Audi back from the brink.
It would be a shame to write off the vehicle for one ECU.
Search item number 331010484428.
thanks for the link by the way, sorted out the caching issue. For some reason the cache was keeping me out of these areas. Brilliant, I guess the real question is why can the service people and audi not do this. Go people power
you could also try a company called BBA Reman,havent got there phone number but just google them,they are from europr orig but have offices in usa and Canada.They reman ecu's and all sorts of electronic stuff