Just a short addition to a previous contribution..
Here is the support for my extruder J.A.B.E. (Just Another Bowden Extruder).
It is designed to install on the upper part of a Reprap Mendel 3D02 (See photo). Support is to be fixed on the threaded rod thanks to Rilsan collars inserted in dedicated housings.
The extruder is fixed on the support thanks to 2x M3 screws.