I cannot find this combo anywhere in the DJI sales info...but can find on ebay  and  also now in HobbyKing but....is it a genuine product??

Also, - where can I get inflormation on  compabitble radios/binding issues if any.

Its on the store HERE
But not available to buy.
"Support Futaba S-Bus and PPM receiver"

You can find all the information about DJI Naza-m Lite with GPS combo from DJI website http://store.dji.com/search?q=Naza-M+Lite&from=buy_now
And know more about popular quadcopter flight controllers comparison can click here http://www.rcdronegood.com/flight-controller-board-comparison/
May can help you.