One of the SC shops actually had Nitrox for a time (I can't recall which shop, it may have been Marina Del Rey?), according to the guy I talked to who said he was the driving force at the time, but at some point shortly thereafter management got cold feet and made them take it out. I hope they revisit their decision soon, because SC is one of the best places locally for fills. Deep pockets = good compressor. The quality of the people running it can vary, but fortunately most of the folks at the one closest to me are very good, and know how to properly fill an HP tank.