I know there have been threads like this before, but maybe it'll help someone new, so I thought I'd post up a couple links. This should help those who, like me, would rather order online than drive around for an hour trying to find stuff.
I recently bought the following:
Restore: $24.50 + shipping
Restore Coolant System Cleaner Gallon, CC2610, Fleetguard Cummins
Restore Plus: $28.50 + shipping
Cooling system cleaner restore plus, CC2638, Fleetguard Cummins
The pictures for these two products are wrong on the site. Don't worry though, I ordered both of these last week and got the proper products.
Rotella ELC (in 1-gallon increments): $75.16 (for 4 gallons) + shipping
Antifreeze Coolant Rotella - 9404106021 - Antifreeze - Radiator & Accessories - Automotive - by
I paid just over $100 for the coolant, but I'm ok with that. I bought Final Charge Global for $24/gallon last time - and had to sit in traffic.