you could make it yourself without too much trouble.
call an aluminum extruder, give them a CAD file, have them cut a die, and you are off to the races extruding as many lengths as you want.
its that easy. Thats why, it would be very hard for anyone to tell you who makes it. though due to the complexity of it, it probably came from one of the bigger, more capable extrusion outfits. could have some IP attached to the geometry as well.