If you want to rebuild that old Crossman, this is the guy to talk to:
Flying Dragon Air Rifles | Airguns | Tuning | Repairs and Parts
The Industry Brand guns are clones of that old C02 Crossman of yours. He has 3 basic springer models of Xisico brand and one of them should meet your needs. Pricing is quite good considering that he custom rebuilds every rifle before he ships it to you.
These Chinese guns are very good copies of RWS air rifles.
Model XS28 = RWS Model 350 Magnum
Model XS25 = RWS Model 34
Model XS12 = Probably some other youth model RWS, but I don't know the model exactly
A phone call is probably best to answer your questions.
Before anyone starts asking why I didn't get the Flying Dragon Xisico XS28M, instead of the Hatsan 125, I will tell you it was a very hard choice that came down to free shipping in the end as they were both the same price. The Flying Dragon is like a custom built 1911 government model. A custom built 1911 but still a straight up government model. While the Hatsan 125 is like a production 1911, but with all the custom improvements built in, like with a Taurus PT-1911. It came down to about $20 UPS ground shipping.
The Ruger Air Magnum is the same Chinese clone without the custom work and runs $167 at Midway USA. The Flying Dragon for $28 more is clearly the better deal. JMHO