Any NOS we find will have been sitting on a shelf for 40+ years and those from a car will be in a similar state as ours!
A Google search for 'propshaft support' turns up many images. I'm sure there's one out there that can be adapted. Unless the club can get a batch refurbished...
I'm in the same boat Mike. The irony is that it was spotted by the examiner at the MOT station, but he couldn't fail it, only list it as an advisory cos there's no check box on the DVLA site to identify it as a fault. At the time he showed it to me the rubber was perished and had split from the outer case.
Not that made any difference to the outcome as I hit a pot hole on the way back and.... bonk a donk a bonk bonk bonk a donk.... and it was completely goosed. No rubber there at all now.
Anyway have already measured the shaft cos is no chance of finding a NOS one. Think I might have identified a potential replacement just waiting for the guy to confirm the dimensions.
Tim
Building the 'Mark II' fastback Rapier ('Arrocuda').