Furnace is acting up... NT-30k Suburban

[groundhogy]

Yup.... I was waiting for it. Wasn't watching too carefully, but I saw it hit 27 degrees last night.

The furnace woke me up making a screaching type noise. I'm thinking blower motor?

I have an NT-30k.

Does anyone have a lead on the motor if that's what it is?
I don't think its in production anymore.
Wondering what the motor part number is.
There will be a Suburban part number and then a real manufacturers part number.
Then, there might be an alternative motor that might be form, fit, and function.

Thanks,
gh