Hi, yes the M3 wings would fit on a standard coupe but they would look a bit odd as the wheel arch on the M3 sticks out further than the standard one so your front wheel will look a little lost in the new wheel well.
The M3 bumber will fit after you have fitted the M3 wings.
If you still want to do this the best place would be either ebay or FABdirect.com who are based in England
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