Look at the lever on a Delta .68 pistol or a PT JR. Those use a lever to pierce the cartridge. ASP used to sell longer versions of those handles for people to use in custom lever changers. I've looked into. Wouldn't really be that hard to buy a stock pistol lever and modify a standard drop out changer to work together.
Paintball changed for me twice in my life, when a close friend introduced me to pump play and cockers and when I went from woodsball with Tippmanns to tournament ball with my Bob Long Rapper and AKA Viking on the UW-Stout Team. I'm a better player thanks to both occurrences.