If you want details of the manufacturers of pedestrian protection test equipment then you are best off contacting the test houses. I know that TRL's test rig is made by Frazer Nash. MIRA also have a full test rig - don't know who makes it.
If you want companies that are providing solutions then there are a large range. It really depends on whether you are after a passive or active solution. If you want more details on this let me know.