This is a basic cover replacement I CADed for a relative. It is longer than the original, but I think it looks better this way. Fits early 2000 Audi TT models. I know it isn't perfect but this is just a quick fix so you can go ahead and mod it as you see fit.
Print upside down like in the photo so the 'TT' is upside down. This way no support is needed. The two locking clips should be at the bottom.
If the cover doesn't fit perfectly its probably due to the model variation in Audi TTs. A little hot glue or even just super glue will work fine.
Coat the two clips on the inside with your prefered glue, then put some over the back and top too. This will ensure a good strong bond. FYI - Be careful not to douse it with glue as you don't wanna ruin your dash! I take no responsibility for damage done to your dash or AC/headlight button.
Good luck. :)