My eye is now back to normal and garage sessions have resumed!
During my recovery period I got lucky on a front passenger side quarter panel. It was listed on eBay, but the title was brief and the description somewhat vague. The listing made no mention of the manufacturer, but my intuition told me that it was likely a genuine VW Mexi panel. After several attempts to establish contact I finally managed to speak with the seller literally minutes before the end of the auction. He couldn't tell me if it was a genuine or not as it had been collecting dust in his garage for years and he couldn't recall much about it. He lived too far for me to collect in person, but was happy for me to arrange my own courier. The price was low with just one other bidder, so I took a punt on it and hoped it was what I suspected it to be. Got the panel for a mere £72 and found a courier who transported it across the country for under £10 (super bargain!). The following week I took delivery of the bulky parcel and eagerly unwrapped the panel:
Got a little tingle when I saw the manufactures label:
It was indeed a genuine VW panel 'Assembled in Mexico'. An excellent result considering that these are rapidly becoming scarce and now command a high price tag from the usual parts vendors (£250 currently).
Delighted that I now have matching Mexi panels for the front end: