Scoops are for asthetics only, there is no proof that they work (course there isn't that they don't work). I have one on my car, and it's for looks, not functionality. In a way, i would think that it would ruin the natural flow of air inside your engine bay since the air is moving upwards.
Lot's of companies sell the replicas, i have had good luck with
www.visracing.com. These guys actually make there own replicas and most of the resellers you buy from, get it from these guys, might as well skip the middle man and get it from the source.
I personally think the toms scoop look a little horrid which is why i am going with the bomex scoops. I actually enjoy the look of bomex scoops on an mr2, but you have to get both sides for bomex.
This is mostly opinion, it's your car, you do what you want with it. If i was home, i would sell you my scoops for real cheap.
reflexx - third picture down, please tell me that is still not tape on your car and you forgot to pull it off and painted on it? got any more pictures?