can not comment on the Leotek as I have never "touched" one but will state that Phillips Lumac roadfocus small is serviceable as the driver "ballast" is a sealed replaceable module like a traditional "ballast" and the LED panel looks to be removable and the GE Evolve are the same with a self contained "ballast"
getting the LED panels OR other parts as a NON UTILITY is likely hard
I have a roadfocus I plan on using as a backyard light dusk to dawn I got it off Ebay
http://www.ebay.com/itm/384405900629