I got myself an ARC top mount, was using it for about a year before i went with the water to air setup.
I must say it was a very good intercooler when moving at speeds.
Healthy flow rate aswel.
The only reason i purchased it was to take it to a reputable shop and have them make a replica....the one i purchased has been "loved" thoroughly, fins are bent, its dirty on the outside....pretty much its not a looker but it does it job very well.
From memory it set me back around $400ish
Still got it in the shed somewhere............I recommend getting yourself one while u save for an RC bumper and hood to compliment a water to air in the future
EDIT : unlike the picture above my ARC had the blow off valve on the other end tank.....exactly where the EGR stuff is/was.....clearly the Japanese didn't like emissions control