Need new 6" to 8" inline blower fan for solar air heater

[Brian53713]

I have 2, 4 by 8 eight glass panels attached to this Awesome contraption that worked for years, until blower motor making noise. Dayton 3m727a 1/6 hp 1050 rpm 115v 60 hz 5.6a type motor in a six inch, on one end eight inch, on the other, twenty seven inch, In line blower motor that worked for many years. need new six inch blower that I can convert 6 inch to eight inch, or an eight inch blower, that I can convert to 6 inch to eight inch. Because the flexible insulated hosing is five feet of six inch on the out take and eight inch on the the 10 feet of intake. The thermostatic switch installed in the glass panel contraption, worked, and i'm sure still works. Have been suggested to get adjustable fan speed control model. The previous, vintage one was not. It is hooked to and worked with an awesome round dial thermostat installed properly near other normal house Thermostat. Any suggestions on a replacement in line blower motor that I can convert one end to 6 inch or 8 inch, if necessary. Any DC powered options?
Thank you in advance