Rubber O rings on mirrors

[FlipFlopGriff]

Anyone know where I can source these. I remember someone telling me they are all the same size so I just need to measure it and order 8.
I'm having the car resprayed and have got new mirrors to be fitted but need to finish them off with new rubbers. I was prompted to post this as I noticed one of the old ones was missing when cleaning the car yesterday.
FFG

[yellabelly]

FFG, I have a complete unused set for the mirrors on my S3, kindly provided FOC by Bridgdav, so if you mail me off line with your address I'll mail them to you.
YB

[bridgdav]

Cheeky.....