Hi all need some help. I have a darkside 85 with a broken piston. I live on the east coast usa and its really hard to get salvimar parts shipped. They wont ship to usa for some reason. I dive murky waters and love this gun for the power. Takes down big fish! But i about had it trying to get parts, shafts ect. I'd be willing to use a different system. Stc tomba ect. Or just a different brand piston.But i dont wanna order things that dont fit. Any help from the pneumatic experts would be greatly appreciated.