I got my lock outs from C&C Equipment. I think I paid about $550.00 for the set. They came with a new gasket and took 10 minutes a side to install. You will need to modify the CTIS cover-its simple however. I simply cut out a larger radius to clear the hub of the lock out. You will need to trim the two small brackets that secure the CTIS cover to the lock out hub flange. I did it with a small cut off wheel and a plastic lid to trace a nice radius.
I made the mistake of driving my truck through the wood with the front covers off-the piping got snagged on brush. The covers really do protect to plumbing.
You will be happy with the addition of lock outs. It wont make a huge difference, but a noticeable one. Truck will handle and steer better. Low speed steering effort is reduced a bit as well.
Picture shows the modified cover. My cut-out was a little large-it could have easily snugged the lock out a lot tighter. Would have looked better as well.
Pete