There is (or perhaps now was) a roundnose Brotherwood up-front wheelchair converted one on ebay last week as an MOT failure (welding to cills required). One owner with stupidly low mileage - around 20k I think. It wasn't listed under the main cars & motorcycles section so it didn't come up on a normal search for some reason. It was a nice colour too.
In some ways it's a shame the the Brotherwood conversion made such a fundamental change to the interior layout. There have been a few low mileage ones come up for sale recently, but they're appealing to a really niche market.