I do not have Peterbilt contacts, but you can call Jeff Tackett at Stykemain Trucks, Inc. about Volvos. He specializes in RV applications of Volvo trucks and works directly with conversion manufacturers. He has been very helpful to me in the past. His phone number is (419) 576-7802.
If you are interested in a new Haulmark conversion on a Volvo chassis, contact Jeff Child at Castle Country RV in Utah. They are a new Haulmark Motorcoach dealer and are looking to make some deals to get their name out there. His contact information is firstname.lastname@example.org
or call him at (435) 360-7829.