Finding a nice front disc cover for a bike with conventional forks is hard these days, so here is a good Idea, I got this acerbis spider evolution disc cover and its mount that fits CRF 2004-2008 it replaces the stock right wheel spacer and holds the cover at the same time:
So this spacer is way to big for my bikes axle so I had to work it so it could fit my bike
Here the disc cover and housing on place just to see how it fits
Its all about your bike's right wheel spacer dimensions so they could be copied on the acerbis one.
Hope it benefits you!!