Sold my 2016 GTI and found some old parts laying around. Pay shipping and it’s yours.
Battery blanket/cover
”keys”/hooks to release and pull out infotainment system
Stock HID bulbs with maybe 20k mi
CSG mirror caps from a 2016 GTI. Passenger side has a 2” scuff on the leading edge but very hard to tell that it is there since the underlying plastic is almost the same color. $10 OBO + shipping
White mirror caps from Chinese folding mirror set and never used. sold
Also have stock manual...
You can find plenty of used keys on eBay for around $20, which is what I did when I lost mine. It was little tricky comparing a mirror image without the key, but should be quite easy for you since you still have the key and possibly code ”D”.