R380 oil cooler.

Any one know the part number and where I can get the oil cooler thermostat housing that mounts on the side of the gearbox. Two cooler lines connect to it and run to an oil cooler at the front of the rad. As most are aware the R380 gerbox runs hot . From research and experience a transmission cooler is a must as ATF non synthetic degrades once temps rise above 200F.