I ordered a un-keyed shaft flange from PYI but didn't see that my shaft was keyed. Also it appeared that when I ordered the flange bore as 1 inch, I was sent a 1.25 inch bore.
After talking with Miles at PYI, I was told to send the incorrect shaft flange back for a correct 1 inch bore, keyed flange. No hassles, no issues, just send it back and they will send out the correct one. My opinion of PYI is that they want to ensure you have the correct solution to your need.