where do i get what i need from? And what am i looking for
Whiteline ones go under the driveshaft but I'd be looking for one off a MK1 TT/S3, LCR or VRS
I've already given you examples of 5 different arb's.
Whiteline occasionally come up on eBay or a forum's classified, otherwise get one new from one of the dozens of websites that sell them.
As for the others, again eBay, forums or a scrap yard.