Give these guys a call:
http://www.telescopes-astronomy.com...._contacts.html
I was looking for a focal reducer for my 5" Mak and I found one from these guys. I live in Adelaide so was able to visit them and very nice people.
It's 1.25" in size. There is no branding on it so I have no idea what it is but it was recommended and worked fine. I was very new to the hobby back then and had to trust all was good.
I paid about $90 which is fairly cheap for a reducer and this one is good but I would not advise going too cheap as they are crap and also don't try to reduce too much as your image will be very small.
Another thing I have done is used a 2" adapter for the back of my 5" scope and fitted one of the older Meade or Celestron 0.63 reducers.
It's important that you have the correct spacing between the focal reducer and your camera sensor. Loads of info on the web about that.
Cheers,
Damien.