If you know how to configure a DSL modem [or can learn from the various FAQs on this site], then any recent DSL modem should work.
AT&T Northeast is the old Southern New England Telephone forum. The regulars here all live in CT [unless they moved someplace else]. From the domain you posted from, I'm assuming you're in northeast OH.
If you were in CT, I have several working 4100s and/or 5100s I'd be willing to part with.
You might find someone in your area who has a spare modem if you look in: