Jason
I think Pyment has a toper... what you'll want to look at is the burners and gas control valves and the motors. You'll be able to assess based on brand if they are some odd Turkey parts or US motors (Dayton, etc.) and gas parts (Honeywell, etc.).
Take 10 lbs of beans with you and roast a batch or two.... see how it roasts... look and see how even, how long, etc.
Ambex is partially made in Turkey, all the sheet metal is, so the topers might be good.