Need CK8400-05 to replace gear with stripped set screw


After my first print i started having print quality issues, upon inspection i noticed that the set screw on the gear of the left front rod had stripped out of the gear. I will need to purchase CK8400-05 to get a new gear, how can i do that? I live in a remote part of Northern British Columbia Canada.

Any help or guidance would be appreciated.




After looking at the site i am wondering if this is the same problem that caused the MK2 pulleys.