Roll your own
I built my own LED Nav lights and then bought the Nova Strobes that many others have also done (use the search function). I bought the AGC current source from Turkey that many others have done and even have a couple spares if you (or someone) would like to buy them. There's a lot of documentation out there about LED Navs.
I, too, went with the Duckworks lights, as many people claimed better results with in-wing lights, rather than wing-tip lighting.
I have yet to fly behind any of this yet, so my opinion is barely worth what you paid for it.
David