We're looking to add a transmission oil cooler to the wife's 2009 CX-9... [My M3 is manual tranny and doesn't need a cooler]

I generally have very strong Google-Fu , but, I'm having a hard time finding a manufacturer and part number for an aftermarket cooler...
I'd prefer an heavy duty cooler (why not?), but only plan to haul 1,500 pounds or less generally..

Any links to mfr. sites with listed parts for a CX_9 would be appreciated..

Thanks.!