Hoping for some guidance here. I removed the heater box because the fan was no longer running and will take the opportunity to replace the heater core while it's out. I put the assembly on the bench and applied power to the leads but as expected, the motor still wasn't running. I can see that the fan spins freely however (but assuming the motor is still shot). Short of a gently used motor, are there still sources for new ones? Of course, I'm nervous about a scenario where I need to remove the fan too.