I've seen several... but which ones have the best quality?
so far, the best one I have found is this one.
http://www.killedaway.com/images/yardsales/nesfcadapt.jpg
It has good compatibility, and is easy to mod to have perfect (on everything I know of) compatibility.
I haven't found one that works perfectly stock yet. I haven't been able to find or try the honeybee that goes this direction yet, but I would expect it to be good too..
Not seen one of those yet. Where do you get em?