[amsat-bb] Need help with Kenpro KR600X Internal ring gear

[EC4TR Luis]

Hi all, I have a set elevation-azimuth Kempro KR-5600B, for some time, 
the azimuth rotor broke down to me, namely the internal ring gear, is a 
very common part is the same for several models kempro, Yaesu and daiwa. 
The ring gear is marked as 7501-005
http://www.ure.es/media/kunena/attachments/8171/daiwadr7500engranajes.jpg
  Any help to locate part is welcome.
  73's Luis
EC4TR