Help finding a replacement shock oil seal
 

Hi all,

I've been enjoying catching up with things on this forum, having recently been down my local club (TORCH, Hampshire) with an Optima I raced in the mid 80's. I've enjoyed renovating it, but have found that all the oil falls out of the shocks after just a couple of runs. Dismantling them, it appears the oil seals have gone hard, so I would like to tap your collective wisdom as to where to find a suitable replacement. They are Brimod shocks, and the seal is 3mm ID, 8mm OD and 2.5mm thick:

http://forum.toag.org.uk/shock_oil_seal.jpg

Does anyone know of a good supplier I could try, or alternatively of a modern part that is similar?

Many thanks,
Richard.