was hoping to see a pic or two but absent any, i guess you may have fixed it
yourself. it's not a high load mount and depending where the crack is, may
be an annoyance at best.....or something that needs welded (to fill the crack).
another idea would be to shim with small metal stock to reinforce the base of
the mount and secure it all together. there is a little room beneath the rubber
gasket to make this work. good luck.

__________________
-- raymond~
47º 34'N 122º 18'W