I'm bulding a bike & kayak rack for the bed of my Tacoma. I've got it all welded up but I need some of those security bolts or nuts to mount the crossbars and secure my bike rack. I really want the security nut that takes a special tool to remove. Does anyone know where I can purchase these? I tried Home Depot, Lowes, and the usual auto parts stores but no luck. There is a local specialty fastener company but they only order in bulk and wont help me out since I only need 6.