So I'm able to get a bike rack off a mate for cheap, cheap. The problem is that it only mounts to a square receiver on the car, and I don't have a square receiver.

I see cars everywhere with adapters that bolt on to the existing to bar to accommodate square bars, but buggered if I know where to go or start with this.

Any ideas, preferably in Melbourne, but just outside of Melbourne would be fine if the price and product were worthy.

Cheers, Wal.