.: XT660.com - The #1 XT660 Resource :. - Rear brake caliper bracket

I changed the rear pads on the wife's 660R this evening but the Caliper wasnt for sliding very easily on its bracket. One of the seals on the sliding pins ((the bigger one) was split and the pin just getting rusty. After much levering I got it apart, cleaned up, greased and reassembled but the seal is still split and it wont be long before it seizes again.

I have had a quick google and places like Wemoto dont do a caliper seal kit and there's nothing leaping off the page for anywhere else. Does anyone know if you can buy such a kit for a '10 plate 660R or is it down to the Yamaha dealer for parts?