I just paid 10 bucks for an o-ring for a Robin EX27 engine's carburetor bowl that was leaking. The original leaked, and the one I got from the hardware store eventually leaked and I couldn't seem to match the size up again. Anyway, I ordered the OEM part on line, and not only is it expensive, it's gonna take 2 weeks to get here! Local small engine place couldn't match it. Can anyone suggest good and cheap on-line parts places? I might stop by at another hardware place-it's a tad less than 2".