My engine was rebuilt 2 years ago and new engine mounts went in with it. The rubber mounts are cracked now and need to be replaced. Is it normal for them to wear out like that after only 2 years? Does anyone make a stronger mount that will not break so quickly? Total Control Products makes one, but a set costs $250 which is too much for me. I need to get the mounts now because I am putting in my new toploader this weekend, and I want to get it all done at once. Thanks.