crank up satellite antenna parts on 1999 Bounder

[Crank]

My 1999 Fleetwood Bounder has a roof mount crank up satellite antenna. I am look for parts and/or manual for the unit. NO paperwork accompanied this antenna.
The part I need is an approximate 18" long square shaft that the dish itself mounts on and attaches to the turret base. It has 3 holes drilled into the shaft for mounting the dish and securing to the turret. The roof mounting base has the number 3100524 stamped on it. The swivel turret has the number 3100520 stamped on it.
The other unique trait is that this satellite antenna has two arms, one on each side of the shaft, that acts as the mechanism to retract the LNB arm as the satellite antenna is retracted.
I am unable to find the actual unit on the website and do not know what model I am working with. If any one has a similiar motorhome with this satellite antenna and has the parts manual, I need to obtain a copy of the parts list and where to order this item.
The gear mechanism that inserts in the bottom end of the shaft and connects to the worm gear is undamaged.
Thanks for your assistance.

[Winegard-Mobiletech]

If that boom is damaged, it is likely that reflector and other parts are also damaged.

http://www.winegard.com/kbase/upload/24 ... 0-4646.pdf

Both elevation gears and the reflector are likely to be damaged as well.