We have 450 x 280 x 75mm Coolers for the VN-VY Series Chassis, which also include the Statesmans, becasue they are all the same.
We have the Intercooler Adaptor Plate, FMIC, Plumbing and Accessory Kit, everything you need to cool your Factory Supercharged V6 Statesman
Check it out here:
http://www.v6supercharged.com.au/coolerplumbing.asp
Hope this helps.
Regards
Tonsta