Never really found a need on an oil cooler unless your racing, or towing heavy loads alot... 2 things that dont really come to mind with a 3.0.
But all you need is the adapter plate for the oil filter. Kind of a generic ford part. Then run lines to any basic universal oil cooler radiator. Be sure not to get a cooler made for transmissions, they dont flow enough volume. Transmission coolers use high pressure, oil coolers uses low pressure but high volume.