Hi
I have some round ones fitted to my car - large in diameter - make unknown and I struggle to adjust them . On looking at some other morgans I noticed a better design of ball and socket was available in metal instead of plastic like the ones fitted to my car
So I ordered some from Melvyn's - they are MUCH better and I can recommend these - They are made by halcyon classic parts -
http://classicpartsltd.com 30 quid each for the mirrors without the base
regards
Jon