you're talking about a triangular shaped net similar to this type?

http://s2.pegasusautoracing.com/024.pdf

but with more webbing, perhaps?

but you want a wing on your seat sort of like this:

http://www.allstar-performance.com/product.htm?prod=111

i've been thinking about something also.

tom

p.s., not sure how to attach it "legally" but i am planning to add a cross bar between the "A" pillar bars over the dash. the windshield is shot and it will be easier to do with it out. that bar could be where the tip of the "triangle" on the side net goes.