costs of gearboxes?

standard and uprated ones?

ive got an S2 RS turbo sat in my garage with a 1.9 bottom end and a shit load of power... 264 horses of it and its missing a gearbox! what would people suggest?

its eaten thru 3 1.8 diesel boxes, 2 standard RS boxes and a 1.3 box in less than 18 months b4 i got it. cheers