Did you buy the prop new? If so I thought powertech would take it back and send you another prop for a small fee.
You can also try here
http://www.bospropeller.com/Propellers.html
A bit of a drive for you but it may be worth it. He keeps lots of props in stock. His shop is across from a boat launch. Put a deposit on the prop slap it on your boat run it. If you don't like it go get another one.