Furnace Armstrong Ultra 90 Armstrong Furnace Thermocouple Needed For This Unit/no Generic?

Armstrong Furnace thermocouple needed for this unit/no generic? - furnace armstrong ultra 90

Thermocouple problem: Armstrong Furn. can 30/37.The old serial number is located in its own way is located, is # 1 Metal Plate: MG64-M664-110D or 110D plate next to a G17. 1 / 16 hp, 110,000 input, electr. 120 qualification. Thermal only for 2 months, then they must be replaced 6 times in 4 years. We need (in the unit was) to Home Depot and get a copy, Honeywell 36 "" Gas Wholesale Furn / heating. we only need about a 8 / 10 "coil. I'm trying to get the correct thermocouple