A lot of the time to find the diesel versions of vehicles you have to head north to get a hold of them if they are in the states. Many of the dealers in Florida will claim they can't even special order one for you. I think it’s dumb but that’s the way it all works for some reason.
But if you want new (heck even if you want used) step one to finding out would defiantly be contacting your local dealerships it's as simple as giving them a call and just asking most of the time they will give you a simitruthful answer, if you haven't done that already.