Forget about getting any support from TC, unless you know someone there. I know that the Lyman would work and not sure about Traditions. ......Depending on your firelock, I'd look at Lyman or even Traditions (and perhaps TC, but I'm not sure if they use one) for their spring and modify it (size it) to fit.
I think you have something here. The site allowed me to put on, in the shopping basket. Great lead and I am going to order one. Thanks ......T. O'Heir; No idea how current this is.