The 'dog bone' does have two rubber bushings. Ford is probably the only place to get replacements if yours need replacing.
Honestly though, I would just remove it. The metal sleeves in the bushings (of the dog bone) slide out pretty easily. You can remove and reuse the sleeves along with the stock bolts to remount the snubber smacker plate back onto the rear end. It'll look kinda funny with the two bolts hanging low. But it will do until you can get some shorter bolts.