I have a Skanaker (Crosman 88) CO2 pistol that I am attempting to replace the seals in. The factory does not support this gun, and non of the airgun suppliers furnish seals. Have any of you gunsmiths had any experience with these pistols? I made up the special tools necessary to take the main valve apart, and have found o rings satisfactory to replace several of the seals. The others will have to be fabricated or molded. The gun is somewhat scarce. I understand that total production was around 500 units.