Looking for system to mount Thule roof carrier on '04 Durango.Has factory rails, need cross-bar rails.?????

You need 4 Thule 450 crossroad brackets and 2 Thule LB50 crossbars. The link will get you a place that sells them for a total of $192.00. They have locations in Canada and The USA. I ordered my rack online and it was shipped from thier Denver Store and recieved it in Kansas City in 2 days.