Simrad/Navico WP 100 Wheelpilot

[ESampsel]

Hi,
Does anyone know where I can purchase spare parts for an old Navico WP 100 Autopilot? Specifically, the plastic drive rings (Items 1 and 2 in the attached photo. I have scoured the internet and can't seem to find them. I found the belt, but not the plastic rings. Any help would be appreciated!
Erik

 

[dmax]

Here's a thread with some links for parts: Navico Simrand WP-30

 

[ESampsel]

Thanks--I had already checked all of those links....no dice.