I have seen the Seal kits on eBay. But I don’t remember for sure which variant it was for. Anytime I had any particular questions on that pistol, I called some airgun Smith’s and they gave me any information that I needed. There are some gunsmith that don’t work on them anymore but there are still several out there that do. I just went on the Internet and googled places and found a few people that worked on them .I was going to buy a nonworking one and have it re-sealed because I could get one for a cheaper price but ended up buying one that was already resealed. I don’t remember but I’m thinking yours is the one that the CO2 cartridge goes in neck first. Then they had one that went in with the neck sticking out and you had to tighten the Piercing cap and back it out a quarter of a turn. Mine is the one with the plunger on the end.But if you do enough Internet searching or call some GunSmith’s, you can find out the information you need. I know Baker air guns don’t work on them anymore. Precision pellet in Pennsylvania does and there’s a guy in Virginia also. Then there’s a guy out in California I believe. I know you’re working on yourself but they can give you the information you need.