Maryl, I'll vouch for Daylilies by the Pond! Sara is absolutely super, and will bend over backward to please you - even if you wouldn't dream of asking for special treatment. : ) Her daylilies are field grown, and I received 4-5 times the number of fans that I ordered from her three years ago. : ) That's 1 1/2 years before my garden contracted rust.
Whether or not Daylilies by the Pond - or any other field grower/nursery - will be able to offer certifiably rust-free daylilies early next spring depends on this winter. If Ohio has a 7-10 day hard freeze (i.e., 24 hours/day for 7-10 days of below 32 degree F temps), then you're good to go.
For my part, I'm very sympathetic to your quest. So far, it looks as though I've gotten rid of rust in my garden in northern California, merely by having extremely dry and relatively cold nights during the winter of 2011/12. Or at least, I've seen no sign of rust for 12 months. (I unfortunately bought daylilies from southeast sellers in the autumn of 2009.)
Here's to a rust-free garden in the future! : )
Elizabete
PS From personal experience I know that Blueridge Daylilies (at
http://www.blueridgedaylilies...., also on eBay as blueridgebuttons
http://stores.ebay.com/Blue-Ri..., and at
http://www.thebloomingauction....) offers rust-free daylilies for shipment as soon as the snow melts in May. I can't recommend them highly enough. : )