Ok...I'm gonna let the secret out...utili-track is nothing more than fancy strut channel. McMater-Carr sells sweet stainless steel 'utilitrac' here:
http://www.mcmaster.com/
search for 'strut channel' and it will come up. I have used this stuff for mounting all kinds of stuff on my bed rails. You can get the special studs from McMaster too. If you get the low profile rail, you will need to buy studs...but if you get the full size, then any utili-track accessory should fit.