Knob, Resistance

This part is NO LONGER AVAILABLE. You cannot purchase this part. Can I still get this?

Listed on the following equipment:
NordicTrack® - GX 3.5 Sport - NTEX03015.0
NordicTrack® - GX3.9 SPORT - NTEX03917.0
Proform - 250 SPX - PFEVEX74915.0
Proform - 350 SPX - PFEX02914.0
Proform - 400 SPX - 831.21905.0
Proform - 400 SPX - 831.21905.1
Proform - 400 SPX - PFEX02817.0
Proform - 400 SPX - PFEX02817C.0
Proform - C400 SPX - PFEX02820C.0

* Images may not be identical to part.