The four digit frame is obviously an older one. The skeleton hammer doesn't ring any bells for me. There is a site (someone here can help) that gives information about what years correspond to what serial numbers. If the forend is the "snap on" variety, in which case the bottom of the barrel will have a round headed stud, it will be pretty hard to find, but you can remove the round headed stud and just use a regular octagon forearm, which shouldn't be too hard to find. T/C can provide a hinge pin and forearm screws if you need them. The barrel you describe is a .357 mag designed for "hot shot" cartridges, no longer available. Remove the choke before firing regular ammo!
Good luck with your toys!
RonF