Impeller compatibility with replacement motor

I have a K3475 STA-RITE C76-59P P4 SERIES TANK BODY. I replaced my pump motor (C48L2PA103A3) with this model ordered from Amazon: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
It's the C48L2PA105C5. Everything fits fine except for the impeller. The impeller itself does screw on the shaft of the new motor, but the shaft does not have the screw hole into which I might locate the impeller with a small screw. The impeller is the Pentair C105-238P.
Here's a picture of the old pump with the hole for the screw in the shaft: https://photos.app.goo.gl/U8PMMZVERsdg4Y5K7

Here's a picture of the small screw which located the impeller in the old motor: https://photos.app.goo.gl/nuUYiDyYqkGcpYav8

Is there another impeller I could purchase which would work with this motor and the C76-59P? If not, is there a replacement for the C76-59P that has the same dimensions for the intake and outlet pipes? Or would the best course of action be to send back the new motor and purchase another one compatible with the C76-59P? If so, could you point me to that motor?

Thanks for you help,
Scott