Here's the Supa Ninja Fuel Return
edit 15nov09: it took me 25 ft of fuel line and the 180 fitting is the wrong one. Overall it wasn't that difficult.
in a couple of months i'll be doing this. I won't be using the AEM rail though, the innovative one will do the same for a third the price.
EDIT 24Sep09: I just ordered everything for the fuel return from Summit and clubRSX. There are a couple of error's on the above parts list.
180deg -6an hose-end is actually pn EAR-818006. and if you get the -6an hose kit you won't need another 90deg hose-end and you will only need to order two straight -6an hose-ends, since the kit comes with one 90deg and two straights.
I'm going to do a detailed DIY when I install it and type up a parts list of everything I used. I purposely am using only 2 vendors for all the parts so that it will be as simple as possible incase someone else is going to do a return system, and those were the 2 with the best prices that I could find as well.