If you can get it down to San Diego, there's HB Industries out in El Cajon. http://www.hbindustries.us/
Bob Rowsell runs the place and he's quite familiar with Flexibles... he's got one of his own, one in his shop, and
just finished repowering two of them with Cummins engines that went to Catalina Island. He's a very nice guy and does amazing work...
Give him a call 619-561-9048