I just had a Lyman frizzen installed on my Thompson and the screw holding the frizzen had to be drilled out and retapped. Had it done at Dixon's in Kempton and it works great now and only cost me $35. I love Dixon's!
I don't know anyone that does it anywhere in your area or mine.
I do know that Grices has them on stock and so does Mahoning Valley Milling in Punxsy. I just saw them at both places on 12/23.
There were some posts about DYI hardening on the Traditional forum in the past few months. Lyman frizzens will not fit your Traditions. I suppose they could be modified to fit but I'm pretty sure it would require more that a drill and tap job. I've installed a bunch of Traditions frizzens over the past couple of years for friends and they have a different shape altogether.
They seem to be the same as factory. All that I have seen have been "tradtions" brand in name. I have put a few on and they worked fine. The issue seems to be getting the right angle with the flints. A shorter flint seems to work well. I have used a bench grinder and shortened a few cut agates and they worked great.