Raymarine ST4000 MK2 Autopilot Gearbox info?

[Allatsea]

Hi all,
Well, my  Raymarine ST4000 MK2 Autopilot gearbox has decided to quit - 3 of the nine plastic gears stripped.
Before parting with $$$ for a new gearbox (if I can find one), maybe somebody knows where I can get some replacement gears?
Raymarine would not have made the gearbox themselves, so does anyone have an idea who manufactured it?
The motor is a Mabuchi RS-555-SH but it looks like they didn't manufacture the gearbox.
Any info would be most welcome.
Btw, in my search I have turned up parts list, diagrams, etc of the ST4000 MK2 - pm me for a copy.
Here's hoping....

[Mick Laver]

Allatsea - I've found the Raymarine technical forum an excellent source for this kind of question. They're at http://raymarine.ning.com/forum. They've helped me with all sorts of oddball things, from getting waypoints from a Mac application into a Ray MFD to rebuilding a ST4000 when all the ball bearings spilled out. They may take a day or two to answer, but they've always been very helpful.

[Indian Falls]

Somewhere in this forum I came across a topic that gave the contact info for a former Ray Marine tech who is continuing to service the obsolete 3000 and 4000.  I wish I had the time to look it up, but if you keep searching for auto helm you may find it.

[Stu Jackson]

http://c34.org/bbs/index.php/topic,7129.0.html

[Allatsea]

Thanks to all of you that replied. Capn Dan on sailnet.com has pointed me to http://kimbroughracingproducts.com/store/index.php?dispatch=products.view&product_id=29872 which looks like it will do the job with minor modification. I have ordered some and eagerly await their arrival.
Hope this info is useful to others.
cheers