[Shop-talk] Looking for a small fan motor ...

[Randall]

You might try poking around on the Grainger web site.  They seem to have a
lot of small HVAC replacement motors listed, including some by A.O. Smith.
http://www.grainger.com

My guess is that it's going to be difficult to find an exact replacement for
what sounds like a purpose-made motor.  You'll probably need to do some
creative adaptation.  A higher rated motor might be a good idea anyway.

Another thought might be to contact the manufacturer of your heater.

-- Randall