Only thing I can suggest is going to swap meets and Ebay. It has been out of production for near a decade.

BTW, I found Spectrum makes a proportional retract servo that work on 7v. http://www.horizonhobby.com/product/...ervo-spmsa7040 They work pretty good, scale like speeds, and strong. I got one flight on the plane so far and it flew nice. Did a little tweaking, lost the hatch I had made to access the switches and fuel dot on the first flight and made a new one, added the bombs and center tank, and rebalanced a touch nose heavy as it was a bit twitchy on the tail. A good sign that it needs a bit of nose weight is when it porpoises when the engine surges. The landing was no flaps and like a trainer. Looking forward to my next flight.