puck-shaped rear transmission mounts

.Anyone here have any idea where to find/locate some of those hard rubber mounting pucks-.have not been able to find those two rubber puck-shaped rear transmission mounts for my XJ-Have been attempting to find something that would lower the transfer case and I am open to any aftermarket or homebrew sources-As always all advice/suggestions appreciated-TIA

http://www.rubiconexpress.com/dynamic/mainpage.asp?folderid=234

or just drill holes in some hockey pucks

.Had'nt thought of that...good idea xjhabitat ,maybe at a couple of dollars I can go down to the local sports outlet store and fab something together.
Thanks !
bill