I was about to recommend that you use the appropriate sized deep socket. That's the system used on my TC's, Knights, and H&R BP rifles. I just use the correct sized socket instead of the BP wrench that the company gives you with the gun. I only carry the manufacturers BP wrench when I'm hunting, in case of an emergency where I have to take out the BP in the field.
Then I took a look at my Traditions rifle, which I haven't used in a while, and realized that it has a completely different BP type wrench. Unless you have a BP that is shaped like a nut, or someone else can think of a tool that looks like an inverted "U" on the end, it looks like you might have to buy a BP wrench from the company. You can give the Sportsmans Guide a call, if your lucky they might have one.