Another outfit that has pickup parts: http://www.mojotone.com/guitar-parts/Pickup-Parts

jimfogle
A really good source for miscellaneous, or hard-to-find instrument parts is Allparts.com.  ere is a link to their pickup parts: https://www.allparts.com/pickup-winding-parts

Nice, Jim. That actually seems to be the supplier for the parts in the ebay account Leadfoot linked to and through your link VIOLA!
 
https://www.allparts.com/PC-0951-023-Pickup-covers-for-Precision-Bassreg-Black_p_2465.html
 
It also has the screws in the "compatible parts" suggestions underneath.
 
Now I just need to see what their payment and shipping methods are all about.
 
Thanks.

Flat rate shipping... "$24.95 USD to Canada"
 
Yowza!
 
Okay, maybe I can get the local shop to order these for me.