I've been interested in Surf Guitar for some time now and I too have been looking for that Surf Guitar sound.
Since no one is responding, I did a little research. Since Dick Dale is my favorite I did my searches based off of his style.
He used a Fender Strat that was customized for him. They added a five postition switch and moved the pickups forward.
His strings were really heavy and used a heavy plastic pick. 14, 18, 28, 38, 48 and 60 gauge regular wound Fender strings.
With the 60 gauge strings and his style, he kept blowing his speakers so Fender built him a 100 watt Dual Showman with two D-130F 15-inch JBL Lansing speakers.
"With the introduction of the 'reverb' unit by guitar maker Leo Fender in 1962," wrote Paul Johnson, "lots of lead guitars took on the big, hollow, tubular tone of the reverb. The Fender reverb gave the guitar a slippery, 'wet' sort of tone, which naturally served to solidify the music's identification as 'the sound of surfing.' Some of the most memorable surf sounds (such as the Chantays' 'Pipeline', the Surfaris' 'Wipe Out', the Pyramids' 'Penetration', and Dick Dale's 'Miserlou') were literally drenched in reverb."
Here's the link to the article. Scroll down to the Dick Dale Section.
http://www.legendarysurfers.com/surf/legends/lsc212.html#dick_dale
I also have the Surf Guitar music book that gives a playing description for each song.
Authentic note-for-note transcriptions straight off the original recordings for 30 of the best surf guitar songs ever! Includes: Let's Go + Lonesome Town + Misirlou + Mr. Moto + Poor Little Fool + Rumble + Surfin' Safari + Tequila + Wipe Out + and more. Also features a souvenir photo section and playing notes on each song. Includes tab.
http://www.musicnotes.com/sheetmusic/book.asp?ppn=BKHL315168
I hope that helps a little. I'm using a Fender Tele and my strings are pretty light. After reading the Dick Dale info, I'm going to get thicker strings. I did switch to a super heavy pick and that helped a lot. I'm just using a small Crate practice amp with spring reverb and it's fun to play around with.
I'm sure there are a bunch of modern technology that'll recreate the same sounds. I found it interesting to see how Dick Dale created his sound. It seems pretty basic. I'll continue to research and post any new findings.