Help identifying this hotend nozzle

I've got an ebay prusa i3 with next to nothing "standard". I recently got a clog in my extruder hotend and had to disassemble it and clean it. While doing so I damaged the teflon sleeve and now I need a new one, but I have no idea what kind of nozzle this thing has. Here are some photos:





It fits into a mount with no threads and is held in place with a set screw:



The teflon tube measures roughly 3.0 mm OD and 1.9 ID. and fits into the heat tube and the nozzle.

There is a "funnel" at the cold end:



Any help appreciated.

Some googling seems to indicate that this is might be a MK9 nozzle, but not much info on what machines ever used this setup.

[www.p3-d.com]

That page notes: "Use with 2mm x 3mm PTFE tubes" which matches my dimensions somewhat. Unfortunately, I still can't find a source for teflon tubes with those dimensions.

The closest I could come to anything that looks like my heat break is this:

[www.3dprima.com]

but no luck on finding any other info about the unthreaded tube.