I've been re-using this pic a bit, but it applies here so...
Here's a snap of my Provari with a Kayfun Lite + on top, and it's wrapped in a flexi-sleeve from
Serenity Gear. It also has my Semovar, which is pertinent since I have the blue M-Tank on top on that KFL+.
I agree with what Sthur posted above; I recommend
VapeRev as well. They're local to me, so they're my B&M and I'm there probably once a week.

I bought the blue M-Tank there, and the other colors in stock were yellow, red and orange. I don't recall seeing green. I think they're going to start carrying colors to replace the LED window as well, but I don't know if/when.
I should note the M-Tanks aren't glass, so they ARE susceptible to tank cracking. I haven't had one crack on me yet, but I made the mistake of soaking one in really hot water and it got cloudy on me (hence the reason I went and bought the blue one

)