92-93 peeps liquid filled mounts Q's

Ok I was wondering if there is a way to repair the liquid filled side motor mounts or get substitues for them…I really dont like these liquid filled mount, breaks easy and expensive as hell. I had a 90 teg b4 and know for sure that the mounts are shorter.

Can I literally punch a hole in it and fill it with urethane? Has anyone tried?

TIA
Ken

http://www.g2ic.com/forums/showthread.php?s=&threadid=31035