acidcustoms can probably make em for you, he did C/F triggers/eye covers and other stuff for the ICD community and I think the macdev community also. Just the shipping is a pain since he is down under.
You can also get sheets of C/F on ebay and other places that are decently thick, you just need to tape where you are going to cut to try and prevent fraying and having a good sharp cutter is a huge plus.
I have drilled through C/F before and with tape it works fine, havent cut it though.
edit: Also I dont remember if it was deadlywind or era designs who made these but since the freestyles used clamshells if you can find a set of these they should work, again u would need to cut your own window.