If the 600's in bits you could enter the 996 in Hottrax's new Modern Classic Series, there are already some ex Desmo riders running 996's. Here's a link to the snetterton results to give you an idea of the field.
http://www.tsl-timing.com/hottrax/2012/121678csb.pdf There are 2 classes for more or less modified bikes.
Runs over the same weekends as the desmodue.
pete
"Nearly all men can stand adversity, but if you want to test a man's character, give him power". Abraham Lincoln ...53 horse power should do it