I hold a treadmill made by Athletech and it have a broken knob. The section cannot be used until I replace the knob. I've searched the net and cannot find this manufacturer. I necessitate a...

I've searched the net and cannot find this manufacturer. I necessitate a key and guide. Any thoughts?
Replace window or replace tattered drywall first?
Answers:    Athletech used to make treadmills for Kmart, but doesn't verbs its own customer service. However, Kmart and Sears are now merged. Sears have a pretty good home product service. Try calling the local Sears service group. They might be capable of help.