I've got two stubby mk3 mirrors on mine. Got the passenger from a scrap yard and a stubby drivers one from Austria! Mk3 mirrors fit a mk2 perfectly, all the fixing holes line up. I got electric ones and just cut the wires off then just position the mirror in place with my hand and the motor holds it in place very solid. Manual ones are different tho, the cables are much longer on mk3 ones, but you could just hide the cable in the door card. (word of warning tho-don't just chop the manual cables off because they hold the glass in the mirror so you would have to glue it back in!)
I do think two mk3 stubby mirrors suit the mk2 better than the original huge square ones!
Hope this helps you all!
Merry Christmas! Kyle