Hi Mike
Got my net from Ha*****s - cheap & cheerful with metal hooks
Also bought some stainless 'P' clips, type used to hold brake pipes etc, got 3 down each side of bonnet, and one at front and back sort-of central.
I usually have a strop, with shackle, a pair of gloves and possibly the winch-rope (not wire) tucked under and, touch wood, it all seems to stay put.
A mate of mine came back from the 2005 Belgium Nationals with a crate of beer under his bonnet net - raised a few eyebrows going round the M25, but he never got pulled....
HtH, Chris
If I could work out how, and it wasn't raining out, I'd go take a piccy or two - but it is p*****g down, and dark...sorry!