My dash cap isn't from DashTops, but it looks similar to the one they sell. It's been in the car for 2+ years now and I haven't had any problems with it warping or cracking. I bought it from Coverlay Mfg. and it seems like it was about the same price that the DashTops ones are. This thread has some pictures of mine:
http://www.peachparts.com/shopforum/diesel-discussion/163956-dash-cracking-post1271170.html#post1271170