a cut and paste from my response in the partition thread:
I went to O'Reilly's and bought the Mr Gasket tie down kit for short bed pickups, cost around $120 if I remember correctly. Mac's tie downs have a similar product but much more expensive. the 6' rail fits perfect on my M416, I have it mounted at the bottom of where the bed first flares out. you can buy extra tie down points ($20 for two), which I did. the best thing about this system is you can move the tie down anchors where you need them and when you don't need them you have a virtually uncluttered bed (that is if you even consider the minimal space these rails occupy and where I mounted them it is rarely if ever occupied) if your cargo is not as tall just mount the rails lower, my location was based on tying down jerry cans and works well. if you have some smaller cargo you can buy 1' long rails and mount accordingly. while partitions are nice they do not securely hold your cargo down, any bumps or off camber or God forbid a roll over and your cargo is not going to stay in place. works for me, is not neccasarily cheap but it also adds a negligable amount of weight.
I don't have any close pics of just the rails but these should give you an idea