Does anyone know of a reliable source for this round? My dealer can find a box of it every once in a while but I would to find someone I can get it from on a regular basis. I have a number of pieces that use this round and I love shooting them but it's bummer to just get started and run out of ammo. .38 Super will fit but the mettalurgy in these old things won't take the higher pressures created by that round. Thanks in advance.