Hi, I'm trying to get some parts for my crash damaged A3. I went to Audi to get quotes, and part numbers! Now I have all the part numbers I've been searching ebay and have found items very similar to what I want but the part numbers vary slightly. For example, I need crash bar bracket 8P0 807 134 A, on ebay I've found 8P3 807 134 A. It looks the same, but will it fit? What does the first bit of the part number relate to? Also I need parking sensor 1S0 919 275 A, on ebay I've found 1S0 919 275, does the A not being there matter? Thanks!