Can anybody tell me the size of the bolts and spacers used to attach the Honda Back Rest? I bought a back rest from a forum member and he neglected to disclose that it was missing the hardware. He told me that when he had the dealer change the seat, the dealer didn't give the hardware back. I've called several dealers and they all said the same thing, attachment hardware not sold separately. They didn't have info on the bolt and spacer sizes. Any help would be appreciated!