I bought a 45F off of eBay and the rear standard was broken when it arrived (they sent it in the case and while the box was padded - the case wasn't). I see plenty of replacement parts on eBay but I do not see a rear standard. Only fronts. Looking at the camera it appears that the parts are identical. Does anyone know if this is the case? Will the 45F front standard also work as the rear standard?

Thanks for any help.