indirect water heater: where to purchase?

in Cincinnati, where i live,there is very little choice of indirects for sale, at least that i can find.
anyone have experience with online purchase and shipping to home of something that large?
which vendors?

I would think shipping a single tank might be problematic and expensive, especially to a residence. Bulk delivery to a commerical location is much more ecconomical. This is the sort of thing most often supplied by your HVAC pro, so you may not be able to get a good deal purchasing directly. I chose to have a SuperStor installed. It has a SS tank, so should last nearly indefinately. Expect the boiler to die first...