Phil had an adaptor made up which seemed to work well, or you can get a longer shock. Ohlins DU235 is up to 12mm longer than std, but if you're going to spend that sort of money then I'd recommend you get one made up with a custom body length. It'll only cost about £50 more and you'll have the exact adjustment range you want.
Another alternative if you buy an ohlins, or any other with ride height adjustment, is to have a new spiggot made up for the lower end. This is what I intend to do this winter, have a few made of varying lengths and spend some time finding out which's best.
If you search back on the board you should find some post from Skids & I on shock length:
http://www.ducatisportingclub.com/sh...ighlight=du235 Cheers,
Ali