Looking for large disc sander wheel

[rockcrawln]

I was just given a new 5hp 3 phase compressor motor that I would love to use as a disc sander. Does anyone know if you can get the disc sander wheel by its self? I was thinking about something around 24" in diameter.
Something like this only bigger.

http://i15.ebayimg.com/05/i/07/15/c3/5b_1_b.JPG

Thanks