Thanks for the pictures! That helps allot to have something to look at.
The mirrors could be cleaned up by the following:
http://ecomodder.com/forum/showthrea...pes-11183.html
See figure 12.
The shape should be "closing" to reduce the mirror wake size.
The shape could easily be carved from foam, but will need to be covered or painted to keep the UV from degrading the foam. Latex paint works good for this.
Hope this helps.
Jim.