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.
Exactly. ASP made them with a longer lever to be more lever changer style specifically for modders to create their own lever changers. Sadly they don't make them anymore but there are places where you can buy a stock lever like the one pictured and just use the stock lever or you could create your own lever. This is actually my next step in moving to stock class is created my own lever changer exactly like this.