It's been a LONG time since I had mine off, but I think you need a trim removal tool to do it properly...and then you still gotta be very careful.
Autozone...Pepboys...whatever, they usually have'm in stock.
EDIT: A quick search turned up this thread where they say you 'have' to break the clips to get them off. Like I said, it's been a long time since I did mine...maybe I did eventually have to break them.
http://www.elcovaforums.com/forums/s...ad.php?t=36865