BRP sells them. I put them on my '05 and also machined aluminu round stock to fit in the tunnel extrusions that attach to the outside of the rinning board. made them fairly tight and punded them in. then reattached the extrusin to the running board. I didnt feel that BRP's stiffeners were enough so I did this too. I am 230lbs and they are straight as an arrow after 2000 miles