The long-OOP Rhino box "Cowabunga" was a great 4-CD set. Maybe it can be found online somewhere.
Contemporary instro guitar bands to check out:
Aqua Velvets
Insect Surfers
Mermen
Big Lazy
The Sadies have a surf tendency, although their music runs more towards the Byrds, overall. They did the soundtrack to the movie "Tales of the Rat Fink" about Ed "Big Daddy" Roth. All guitar surf/hot rod music.
Look into the Del-Fi label for a lot of this stuff, too. The De-Fenders, The Darts, The Deuce Coupes - all worth checking out.