I’ve just replaced the glass on my drivers side as it was no longer heating. £15 and all of 2 mins to replace and it’s fixed.
Glass is better than the OE I took off as it contains the split section to improve vision.
Sourced from here if that helps
We are specialize in supplying Quality wing mirrors at low prices , High Qual ity volkswagen driver/near side Wing Mirror Glass, volkswagen passenger/off side Wing Mirrors
www.thewingmirrorcompany.co.uk