I ordered it thru my local dealer, via their ordinary stock shipments (to avoid any freight). It took a week to get to avoid freight.
It was $124. The kit I rec’d is specific for the x900 (K7591-9945-0)(KTC W/G #V5241) but a similar one is for the X1120D and X1100C (K7451-9945-0)(KTC W/G #V5243). The differences are minor hardware fitting shapes. The Instructions included are for the X900, X1100D, X1100C and only vary from each other to accommodate those minor hardware differences.
They initially quoted $108 for the parts and $268 labor to install. I told them I’d install it and when I picked it up a week later the price was $124. (?…. I didn’t argue)
Reading the instructions, I believe this can be done in about 20-30 minutes by anyone who knows how to raise the bed, use a tye-wrap, turn two nuts and install a cotter-pin.…. I’ll report back later this week when I actually do this. I can’t imagine why they think it’s worth $268 labor.