Moto-Lita only lists bosses for TVR up to 1969, then from 1988 onwards. I think the steering column on my Vixen S3 is a Triumph unit of some kind but not sure from which model.
In theory Triumph herald/Spitfire but TVR had a small boss. Modern Moto Lita wheels use bigger PCD boss, only fit if you use new wheel. For originality TVR wheel very rare. I may be able to find some in the loft
