I found one similar at a local surplus store that carries some minor airsoft stuff.
I love the thing to peices, it's a unique peice of kit. Only problem I have with mine is a faulty safety design. Even with the pin inserted, it still risks going off and has.
*Lock down the safety lever, insert safety pin all's good*
*place it down on the floor right here so it's nice an-BOOM wooosh*
I'm looking at some ways of modding it somehow, it just seems as if the safety arm will not come far enough down to make a firm uh, safety latch? lol