I've done alot of my own CF parts. Mostly for my crawler, but I have made my own ESC mount, reinforced and enlarged my HR battery mount etc.
Just know this, good CF is tough as hell. It's worn down many CF rated jigsaw blades, chopsaw blades, diamond blades. Personally doesn't bother me as I can write it all off. But pay attention to safety measures like wearing a mask and cutting in well ventilated areas. I like to set my shop vac up to catch dust.
There are some good CF plate providers on Amazon or Ebay but there are many more crap pieces that are unsuitable. I've grown to like ordering my CF from Acer lately. They are an RC provider of bearings and CF. Their stuff is well made.