I got in touch with the Poulan customer support desk and determined that my engine was from a 2775 saw, not a 2750 as I thought. With some digging, using the #'s on the crankcase, they determined that I had a 2775. I ordered 2 @ $8.75 each, plus shipping. Should be here in a few days. 530056363 was the correct p/n for my particular case.
Thanks again guys.
Z