The top selling Audi replacement turbos on eBay UK. There is a huge range of options and prices.
1.Cheapest option is probably to get an unbranded new turbo. Check the warranty
2.Next cheapest option would be to get a rebuilt turbo. You will pay an initial core charge which will be refunded when you return your original turbo to the supplier (assuming the core you return is in suitable condition).
3.The most expensive option. Buy a brand new turbo from the same manufacturer that was fitted to your car from the factory.
Scroll down to find your engine below, click on the links to compare prices, warranties and specifications