Found what I needed, info was clear and ordering was easy. Part came as ordered at fair price. I will use them again.
Filter, cooler pad
Breezair exv155, ext155 (4pcs) 31 1/2w x 17 1/2h x 3 1/2d
Buy this part and as many parts as you like and pay only $9.99 shipping, within the Contiguous United States.