I really tried to find that too as I want to run the old school look with my LSX 454, I have been kicking around this:
http://www.delmospeed.com/product/th...y-adapter-ls3/
http://www.jegs.com/i/Chevrolet-Perf...44033/10002/-1
The height is a challenge, probably 11 inches from the deck of the motor, which I am not sure will fit even with the 2 inch cowl hood.
If you find someone that will do the custom version with the stock intake like the photo, then count me in for one too.