I happened to work for a decade with one of the members of the Dead Sea Surfers, Dave Mitchell, who was indeed subsequently part of the Spring Chickens.

The last things I heard about Dave were a)that he'd taken up a career as a jazz guitariast, and b) that he was also working as a guide at the Imperial War Museum's aircraft site in Duxford.

I've no idea if he's still undertaking either pursuit.