Bivy,
Thought to respond to original post but waited to see if anyone could help. Your query is not uncommon, shows up couple times a month. Water-less, oil-less, rectangular box, tri-power compressor owners noting lack of rebuild part availability. STKO, a YouTube airgun contributor, posted a video a year ago alleging a conspiracy by manufacturers in order to promote new sales over rebuilds. Some owners have rebuilt with parts scrounged at local hardware stores; repairs are short-lived. Suspect the truth of the matter is after 20-25 hours of reasonable use, this style of HPA compressor is near the end of a useful life. WM