Large felt gasket for speedo' drive

Hi, does anyone know where, and if I can get the large felt gasket that fits inside the speedometer drive (Commando) cheers, David

I got one from RGM a couple of years ago. Check their website. I stuck thin screwdriver into old seal and working my way around it a little at a time carefully levered up the metal retaining ring till it came off. Then after fittings new seal tap ring evenly back on with soft face leather hammer.

Thanks Toppy, just brought up their website and they're still available, cheers, David