High wind sail for 200cm boom, 460cm mast

Hi,

I'm trying to get a high wind sail w/o having to get new boom and sail. My boom goes down to 200cm. I have a north 460 cm mast.
Is my best bet getting a 7.0'ish race sail from a few years back? I'm flat water BAF'ing.
It's hard to justify spending so much money on boom/mast when I don't get all that many big days.
thanks for any advice...