galv. gunel rod holders

i was talking to a guy over the week end at a lake and we were talking about his gunnel screw on rod holders they looked galv. , there the kind you pull stright up when the fish is on to release the pole almost reminds me of a clam shell design (sorta) , he told me of a web site be i forgot it  would any one know of any good website ,      not dicks or cabelas  they don't have them ......thanks