I know exactly what you are talking about, no I do know where to find them.
I even had a friend bring in his Fiero and he got a new TB, it still leaked a bit, not as bad as his old one.
I greased mine up, it leaked the least, but still a tiny bit. Since you would oil the old leather seals of the old Colmen stoves, I thought this would work best, beyond finding new ones.
Just my $.02
[This message has been edited by sardonyx247 (edited 05-03-2014).]