Be careful with really low resistance atomizers on 510/Riva/eGo, because of too high a draw (current), which may cause premature failure.
You should be able to e-mail any seller, ask them for what the ohms are on the product they are selling. If they call it an LR, they definitely should know its design resistance.
Just a heads-up, in case you go that route. Me, I like my 808s, though I'm about to test an eGo that I got really cheap, for kicks; I definitely don't intend to use any of the nominal 1.5 ohm products on it -- they're OK, just not a clean match for the normal 510 family batteries.
Good luck!