you can
give them your feedback, even ask to be contacted regarding it, but if you look around their website, you'll find that they only deal thru retailers, the number IR gives is for
information about what retail distributors can provide you with parts and service .... why expect IR to stock parts that would likely only need replacing if sadly abused? of all the folks I know with compressors no one has ever had to replace a flywheel/pulley
sorry, but I still think you're PO'd at yourself, or should be, and your situation really shouldn't influence anyone's opinion of IR, or even TSC, as you weren't willing to wait long enough to deal with them, the actual supplier .... and good luck finding
new non-wearing parts for your 51 at all, never mind within 4 weeks

Bill