I have a Goodman furnace that I have been told is obsolete.
I need a new fan blower motor model # GMP100-4
Please provide a reliable website that I can actually order this part.
Thank you

Blower motors are generic and as such are available almost anywhere. Remove the motor from the unit and go to a local supply house. They will match it up to voltage,horse power,rpm's and rotation direction. This is done every day by people all across the country.

Here is a spec sheet

http://www.dnmech.com/lit/Good_GMP_SS186ce.pdf

Motors

http://www.shopwiki.com/search/Goodman+Blower+Motor+P%2FN+B1340021S

Goodman, Janitrol 1/2 H.P. 3-Speed OEM Replacement Furnace Blower Motor: Best Buy Heating and Air Conditioning (http://bestbuyheatingandairconditioning.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=MOT1340020A&Category_Code=m)

HD Supply | Wholesale Maintenance, Electrical, Janitorial, Cleaning Supplies; Tools & Equipment; Hospitality Supply (http://hdsupplysolutions.com/webapp/wcs/stores/servlet/ProductDetailsDisplayView?langId=-1&storeId=10051&catalogId=&rstate=270041-1&req=search)

Just do a Google search there are over 100 listings.