Love those wheels! You say they are TT wheels? What would be the size / name I’d search for on the eBay?
These are 16" Audi Speedlines (7J, ET31). They were the standard wheel on the TT (and as such not very desired in the TT-community). I had a quick look and there are currently two sets on Ebay (there might be more, also on Gumtree, but some sellers don't know they're called Speedlines so to find these you have to sift through all 16" TT wheels for sale).
Also, be aware as there are two other 5-arm 16" designs from Audi, both of which won't fit.
Last, the tyres that the TT comes on (205/55/16) probably won't fit an A2; I haven't tried and went straight for 205/50/16.