Wolfsburg west ones seem to be the best quality I know some pople have had issues with the length of the thread on them though, hasn't seemed to be an issue on the latest batch:
http://www.vwheritage.com/vw_spares_Door-mirror-left-68-79-BQ-WB-S-S-head-Best-Quality-211857513FWW_act_shop.product_pID_207574.htm" onclick="window.open(this.href);return false;
and
http://www.vwheritage.com/vw_spares_Door-Mirror-Right-68-79-BQ-WB-S-S-head-Best-Quality-211857514FWW_act_shop.product_pID_207591.htm" onclick="window.open(this.href);return false;
Dont forget to fit the seals between the mirrors and the body to save the paint:
http://www.vwheritage.com/vw_spares_Mirror-to-door-seal-T2-pair-211857543_act_shop.product_pID_194233.htm" onclick="window.open(this.href);return false;