eBay. Wreckers, Market Place.
You will need to have it set up for your car, so good opportunity to up spec to a Belina or Calais or Stato cluster.
For set up, it is set to V6 (or V8 to suit), airbag arrangement, sedan/wagon etc and Kms with evidence.
You might also be able to have yours repaired by someone like LSxtreme.