Amana has a Part number for a Fan assembly and is 12075003.
This is also by Whirlpool. The old number was AP4010779
There is also a part number from Viking 013112-000
These three parts are considered to be crosses for each one.
The Fan to Replace them that can work is from Orion Fans and the part number is OD6025-24LB
Digi-Key part number 1053-1245-ND
One thing to note is this fan will not have any connectors on it if that is required.
As always it is a good idea to review the specs to make sure it will work for the application.