Dennis_Lambert in Kelowna sells parts (great selection, good prices, I just bought lots of stuff this weekend from him) and ships via greyhound. He doesnt do service, he owns a L300 and L400 and has general mechanical knowledge. His parts website is
http://nomadjdmautopartsca.ipage.com
I don't know the okanagan mechanics, some non-vancouver people come stay with us in Burnaby and get annual maintenance while they are in town. I know several deli's in Kelowna area, but they do a lot of their own maintenance.
Since brother is buying from Mardy, who is one of the top delica experts, I strongly suggest getting mardy or mardy's recommended contacts to service the van before taking it to vernon. You don't want an inexperienced mechanic overtightening something. It is so much easier to fix things here, there are several experts, all the parts are here (if one mechanic doesnt have X part, he just phones one of the other local mechanics to get the needed part).
Your brother should organize a mini meet in vernon soon (and find somewhere that out of towners can park overnight) so he can meet others. We just let people park in our backyard, first arrival gets the guest bedroom, next arrival gets the liviing room floor, after that they sleep in their vans.
Cheers, christine.