Amarillo:
Carlson's Automotive 6014 SW 33rd (on Bell, just north of 34th street) 358-3690
Canyon:
Monkey Wrench Auto 510 23rd Street (23rd is main N/S street, shop is one block south of main E/W street, 4th Avenue) 655-3171
Probably several others, but those are two I use and trust.
If you wander by south 23rd street and 13th avenue, I am sometimes at a shop there....shop #5 in the bright blue building.
[This message has been edited by CanyonAg77 (edited 6/7/2010 4:11p).]