Heater fan won't blow, it needs a modular. Where can we buy one? on 1993 Cadillac Fleetwood

The heater is working but won't blow out the heat. My mechanic said it is the modular. We need to know where we can buy one. My car is a 1993 Catholic Fleetwood Brougham.

Asked by for the 1993 Cadillac Fleetwood
ck out
Thank you, think I found the part I was looking for and also found a good deal on a A/C Compressor!