If you haven't found your conversion yet we design and build them in Minnesota. Take a look at our website.
http://www.toolsetmotorhomes.com
The unit featured in the ad and photos sold for 98K which seems to be in our ballpark. We currently have a 99 Volvo VN64 with a Detroit 430hp and an autoshift looking for a customer. Write me if you have any interest to discuss further.