There are a set on e bay, http://cgi.ebay.com/ebaymotors/1974-1978-74-75-76-77-78-MUSTANG-II-NOS-V8-MOTOR-MOUNTS_W0QQcmdZViewItemQQcategoryZ140686QQihZ022QQitemZ350091160728QQrdZ1QQsspagenameZWDVW Never used but repainted, they look like old stock which may mean the rubber is drying out. They...