Firstly, I don't think that is a genuine GTI, though I could be wrong.
It is possible to take out the red stripe from the grill (I took mine out). But the wheels are defo suspect - they should be either 17" Monzas (silver painted alloys - silver all over), or 18" Monza IIs (diamond cut outer face, dark anthracite paint in the recesses of the pepper-pot holes and all over the inner faces - and a clear laquer all over).
And yes, you can by stamped books from the stealer, but they wont have the data sticker inside the front cover, and they will prolly state sommat like "replacement" all over. Ask the seller for the reg number, AND the full VIN, and trot along to your local stealer with both - they can then get a full history check - including weather its an import or not. If the seller refuses, report the ad on PistonHeads - as there can be dodgy cars sold on PH just like elsewhere.