I printed this up a long time ago:
http://www.thingiverse.com/thing:59855Seems to work well with the E3D hotend, I just opened the filament hole enough to screw in a push in connector.
One thing I did not like is how the thermistor is mounted on the E3D hotend, there is a small hole that you press the thermistor into then use Kapton tape to hold in place, the Kapton tape I tried heats up then loosens, and when that happens thermistor falls out of the hole, I have this on order:
"Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker"
http://www.amazon.com/dp/B0002UEOPAI found out about it over in the E3D forums, right now I have mess of Kapton tape holding the thermistor on the best I can, another thing I disliked was the printed fan shroud that came with the E3D, it was printed with less quality than my own prints, and my prints are not all that good, and it was cracked, thankfully I did not need it.
I printed the test object again and it looks OK, but still a little rough.
But on larger prints, it seems like I am getting some under extrusion but only in certain areas, the extruder is calibrated so I wonder if its speed or my retraction settings.