No I am not a dealer, just an aviation junkie.
Well I'm not sure of dealers in your area...
There is RC buyers warehouse in Nashua that carries Castle stuff...
Most often I buy many of my components online as it often is not the type of things most hobby dealers stock.
I got my HET motor from HET online as I do with most of my Castle Creations ESC's, few dealers stock the high amp high voltage ones I use.
There is a shop in Plymouth CME hobbies as well as Hanson Hobbies that can order stuff for you. The motors I mentioned are in the $60 range the speed controllers vary greatly in price dependent on the size.
Another interesting source for "expendable" components for experiments (that won't cost big bucks if something goes wrong) is BP hobbies. (view online catalog)
Yes the ducted fan setups are cool, however they are not as efficient as a prop. I often use df motors (because of there high rpm capabilities) and either gear them or use them with small diameter props for the type of aircraft I most often build.
I would think given your application where the motors will be moving your going to want to keep them small and as light as possible to keep your rotor assembly as light as possible, that is why I mentioned the DF motors the particular one I mentioned is under 4 ounces in weight.
Here are the websites I use