So I finally decided to cut the motor shaft myself. I have been debating this part for 6 months, and I really have no idea why I didn't do it earlier. It was so easy to do. A brand new hax saw blade and I was set. It took about 10 minutes of slowly cutting and turning the shaft for the best cut. I did it all by hand so reduces the chances of any accidents, and it went great.
This week we are going to contact a few machine shops and hopefully get the coupler machined.