I did, we have one called "Tom's Hardware". I thought that I had some matching (they were standard, but roughly the same size). I got the o-ring on the main jet, seemed to be a nice fit. Needless to say, there was nothing I could do to press that jet in there, just too big. Even with lube. And, sadly, this was their smallest o-ring. Period. I'm still going to try for the valve-spring assemblies. I haven't tried the o-rings I sized for those, yet. Kind of a pain.
Doug