J&R had their shop for quite a few years. Now they have retired. 95% of parts on the HiLo are general RV parts. Our forum members are very good at sourcing parts and answering questions. Tell your brother to do his preventive maintenance . Another piece of advice is to take out all the windows and reseal with butyl tape and Lexel caulk on the outside. UTube has a tutorial on how to do this. No one told us to do this and we ended up having to tear out wet walls and rebuilding.