I contacted them a while back with the idea of mounting one on my Sheraton. The nice part being the ovious part, that you don't have to permanently mar your guitar to mount a Bigsby. I received a reply about 3 hours later - how's that for customer service? Here it is:
Hi Steve,
Thanks for the note. Although originally designed for flat top guitars, the Vibramate V5 kit has been used successfully on arch tops like 335. Here are a couple of photos:
http://www.vibramate.com/photos/Vibramate-335-Style.jpg
http://www.vibramate.com/photos/Vibramate-Stromberg-1.jpg
http://www.vibramate.com/photos/Vibramate-Stromberg-2.jpg
http://www.bigsbyguitars.com/news10.html
The Vibramate V5 is $59.95 and you can currently order it online for International at Gretschgear.com & Elderly.com (The Bigsby B5 Original Vibrato is sold separately) plus shipping;
http://www.gretschstore.com/cgi-bin/store/commerce.cgi?product=Accessories
http://www.elderly.com/accessories/items/VIBV5.htm
Thank you again for your interest in Vibramate!
Sincerely,
Brian Johnson
Customer Service