Sorry bout' that... Looks like agpatel answered your question for me It's my understanding that AG is the only store that carries it at this time.
I was all set to buy some Cquartz to try out this Spring, but I'm a little torn now... Re-load has made it to the top of my favourite list though, so I may still swing that way initially. We'll see in a month
If Opti-Coat is anything like the first version (now called Opti-Guard) I would hold off until it's released.