Refrigerator - Crosley model CNT15R5

Cover, Evaporator Part Number: AP204532

I'm pretty sure this part needs replacement. I removed it, allowed it to defrost but it freezes up causing frost to form on the freezer shelf directly above its location. I even added a layer of aluminum foil between the cover and the coils. Nonetheless, the frig gets no cooler than 47 degrees F on the 'coldest' setting!

The fan motor works, I can feel the coolant in the air and also noticed that there is no more condensation in the drip pan (had been in the past).

An online search for the part says 'Not Available'.

Any ideas on how to get things working properly?

Thanks.