Id really like to firm up the body roll on my XKR. I know the XK-RS comes with bigger sway bars. Does anyone know of a way to aquire them or perhaps an aftermarket company that offers them?

Thanks

 

You can contact NALLEY , JPAM being vendors and dealers they should be able to forward you

 

Were you ever able to find bigger sway bars? I would like to mod my XK if possible.

 

An option to consider is changing sway bar bushings. Most OEM bushings are made of comparatively soft rubber. Energy Suspension offers polyurethane bushings in many different sizes. The Energy Suspension bushings come with a "universal" mounting bracket, complete with grease fitting.
I did this change on another car (not a Jag). It was fairly simple, but I did have to measure my sway bar diameter before ordering to be certain of a good fit. My OEM bushings were fairly soft. The Energy Suspension bushings did make a difference. It wasn't huge, but the car felt a bit more "connected" in quick lane transitions and cornered a little flatter. On the downside, a bit more road noise was transmitted by the harder bushings.