Looking for Winegard satellite parts distributor

[ingram15]

Winegard has discontinued these parts

2750225 Positioner
2753248 Wiring Harness

Can someone tell me where I can find a distributor for a older(2000)
Satellite antenna. The antenna has a part number on it, RD-9900. I'm
told the actual model number is a RD-9946.

The install manual with the part numbers is at:
http://www.winegard.com/mobile/pdf/2451172.pdf

New or used would be a big help.

Thanx