I can host the site if you like on my own server. It has been running since 2003 rock solid. The link below shows when my site first went online dec 31, 2003, and has been ever since.
http://www.whois.net/whois/truckplace.comI have enough bandwidth and disk space available, no issues there. I also host an International Harvester fan club through my hosting as well. Won't cost you a thing for the hosting. You can keep ownership of the actual domains if you like, just point them to my server, or you can transfer the names to me if you like and I can pay for that...I get domain registration at a discount. If you keep the domains registered under you, you will still technically own the site.
If you create a backup of the forum and send me the link to download said backup, I can restore the backup on my server for a seamless integration. (I was into computer programming/web design before getting tired of the cubical and becoming a diesel mechanic)