I am not sure what "mx style" fork covers are, but there are other options besides the boots. SRC makes a neoprene fork seal cover and also a set of fork sliders made to be used with the fork brace. You can see a picture of my "UGLY, I MEAN BUTT UGLY" '89 kdx on page 8 (it's the 6th bike down)of the readers rides on Just KDX. It shows what the forks look like with the sliders.
Brenda