[Ifeffit] Capillaries

Continuing in the vein of marginally relevant questions (you need to take data before you can analyze it with horae!), I have yet another question. To make life more exciting, I would like to take a 4 m in vacuum undulator beamline that has a focussing mirror with a 250x600 micron spot size and focus down as much of the beam as I can to dimensions on the order of a micron (or a little bit bigger) using a monocapillary. I would then like to do microexafs with this setup. The brilliance of the undulator is about 5x10^15 in the range I am interested in (about 11-12 keV). Has anyone had any experience with this sort of focussing and might you recommend a company or spec to try? Thanks in advance. Paul