I don't know of any out at Myrtle Beach, but Kiawah Island has a model 2 at the fire department there. (Nothing terribly exciting.) And I am not sure if you flew in or not, but Charleston Int'l/AFB has an STH-10 or two.
Well I'm back, with no pics unfortunately, and to top things off, my cats broke my indoor mini- T-128; they snapped the speaker head off the dowel rod pole. So, that is my next repair job.