Mace-man,
Call maxim oil. Good folks to deal with at fair prices. They can give you an estimate on shipping.
Since Park's 50 is so hard to come by, they are probably your best bet. They buy in bulk, then break it down into 5 gallon drums for us knife-dummies. They use Fed-Ex ground shipping.
I just got 5 gallons delivered to Alabama last week. Under $125., and that included shipping. Sounds kinda high, but go fill up your car at a gas station.
Robert