Have recently added another silhouette nose cone to the stockpile. It does does have some areas needing attention. So what the best way to repair these bits? What it to look as need as possible. Where would I get the fibre in a similar weave??

Nice find!

I've never seen Silhouette stuff in the flesh, but from the pics it looks like standard light weight woven roving, so shouldn't be a problem to match.

Personally, I'd clean up the damaged areas with a dremel to give you some room to work, then lay up the new glass on the inside and finish it off with some flexible 2-part polyester filler on the outside. Should be an enjoyable job