Unfortunately, the kit is YEARS out of production. Produced by a guy named Dennis Stines. Judging by the pics on MIM, it's the same molds as yours. but without a trigger (so you can add your own) IF you see them come up for sale, there is usually a nice price tag going with it. I was lucky in finding this one, but Iu can tell you I was ripped off in another attempt to get one.
You do the parts list, and I'll give it a try myself lol, there has to be a first time for everything