An oem one isnt much more and will fit much better
£400 to remove, prep, paint and re-fit is a pretty good price if the quality is good.OEM GTI valance is like 60 quid from dealers.
Before you order it, phone upto make sure they have it in stock. I ordered mine in February and it didnt arrive until last week(!) Valance is being painted as we speak so will post pics when l pick it up from the bodyshop.