I thought I'd posted this message here earlier, but it's not here!
I'm not sure where you live in Iowa, but in the southeast corner, near Donnellson there's a nursery called Hillcrest Hostas and More that has a huge selection of hostas and other plants. If you Google it you'll be able to find directions and phone number. It's definitely worth the drive, and she has stuff on sale this late in the year!
Rose