Legacy Dish Receiver Diseqc Adapters

[PC Master]

I know that the new Dish Network equipment (DishPro) uses Diseqc standard for it's switches, etc. They supposedly have adapters to convert the legacy receivers' (2700, 4000, 5000) sat input and switch control out (uses some form of 22Khz switching, but not Diseqc, as far as I'm aware) to Diseqc standards. Does anyone know where I can purchase one or more of these adapters? I might be getting some Diseqc switching stuff, which I assume DishPro receivers would work with, but don't want to trash my old receivers. And yes, I know that DishPro receivers are backwards compatible with the SW64 and such legacy switches and things, but that option will not work for me, unfortunately.

So, once again, does anyone know where I can get an adapter to convert legacy Dish Network receivers to work with Diseqc switches?