If You don’t VIN Swap it, You are out of luck.
Otherwise, You are out of luck.
You cannot scrape another car’s sticker. If You EVER get pulled over and get that scanned, You are in BIG trouble for having a fraudulent sticker.
Of course, if You don’t have a “buddy hookup”, when Your ECM gets scanned, You will fail… for lack of ECM.
You’d have to find a way to make a Stock -or- Stock-like ECM control the motor… or at least APPEAR to for inspection.