I was the one who posted a question about this a year or two ago. I tried Morgan and Melvyn Rutter but the parts are no longer available and were @1000 when they were. Sifab was trying to replicate this for me but the issue I believe was the stretching with all of the curves involved. I sent him the original piece along with the separate resin block that holds the tpms unit and thankfully got the armrest back before he went bust but never got the block back as he still had it when he disappeared.
You could always follow James’s example and polish it to a mirrored finish or get one made of wood to the same spec as your interior wood finish as I think I’ve seen pictures of some cars with that.
The sheer lack of parts was the reason I finally got rid of my S1 but I do still miss it!
