This s a really "bodge it" answer but if your just after the sound just drill a couple of holes in the airbox. BEFORE the filter of course.
This will likely lower the power slightly due to warm air from the engine bay getting into the intake but it will sound good. Did this with my old 1.4 RT before getting a proper induction kit. Sounded very beefy. Just dont go mad with the holes, it will sound much louder driving than testing it on your drive with no load so go a short run after a couple of holes,