This is a modification of Wades extruder to fit a hot-end from BfB.
I made holes to mount the hot-end, and removed all not-needed holes.
I also moved the mounting holes so the filament holes is exactly in the middle of it.

All other parts are unmodified, and should be taken from the original.

You will also need a modified carriage if you want to use this on mendel.
You can find that under http://www.thingiverse.com/thing:3017 and http://www.thingiverse.com/thing:3016

You can find more info on this on:
http://ifeelbeta.de/index.php/production/wades-extruder-with-bfb-hot-end

Print the Extruder body, mount the Bfb hot-end, assemble everything else, have fun.