http://www.ebay.com.au/itm/B-M-SUPERCOOLER-ENGINE-OR-TRANSMISSION-OIL-COOLER-5-3-4-X-11-X-1-1-2-BM70273-/140790146196?pt=LH_DefaultDomain_15&hash=item20c7bf2494
You will have to figure out somewhere to fit the cooler though as we have the window washer bottle where the evos have the oil cooler stock, as well as getting some lines and fittings to connect it to the oil filter flange on the block:

May also need to add a thermostat where the black circle is as the oil will be flowing continuously through the cooler.