The mounts you described are for a 67/ 68 mustang/cougar. The rubber part that goes between the frame mount and the block plate are still available from Ford part no. D1ZZ6038A. The block plate is no longer in production but I think B&B Mfg. is remaking them (call Bryan or Barry), you can also find on e-bay from time to time.
http://cgi.ebay.com/ebaymotors/ws/eB...category=34202