Lol, to my Wife's discontent... I started with an oil change, I already had 7 quarts of oil, and a new Nismo oil filter... I would have rather had the oil cooler put on at the same time. If the frront bumper was going to be off, why not put in the rest of the parts??? And so they went on. They were sitting in storage waiting to get installed anyways.
With regards to the sale price, I'll add the forum link I found... I would contact directly to see if you can get a hold of them.
Huge Sale: AE Oil Cooler Kits