I can think of 5 in the UK that have been done. I thought it was 6 so I may have dreamt it!
The first one I heard of belongs to an ex Spyker race team mechanic. He did his at least 10 years ago.
The second was I guy on here with a green one. I think his name is wolfinsheepsclothes or similar. Then I remember MJ doing one for Bert. The 4th one I saw was on social media somewhere…he has a PF running an RS6 lump and a manual box. And the most recent one I’ve seen is MJ’s.
I did ask the guy who has the pre facelift one if his company could mine but he said no unfortunately
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2002 S8 - Irish Green Pearl. Cat N (saved by the D2 Doctor

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1988 E30 Coupe - Royalblau Metallic
2003 S4 Avant - Light Silver Mettalic
2016 S5 Coupe Black Edition - Glacier White