My problem with "interest only" threads is that they get people's hopes up only to have them dashed in the end. I saw it a million times in the 3G Prelude community, which is sad because there are less aftermarket parts available for 3G Preludes than there are for 2G Integras. People would make posts with all sorts of promises and then they'd either rip people off or just never follow through. I'm not saying that's what you're going to do but that's what I've seen in the past that makes me not like threads like this.
My suggestion would be to buy the Hiro wing if you want one, make a mold of it and produce one-to-three copies. That way you would have a product to showcase and people tend to buy things they actually see lots of pictures of, rather than what exists now, which we have to use our imagination for.
I, myself, am happy with my stock GS spoiler.