New
tanks are 5 for $5.00 at nicstickshop.com. Since I'm not sure if it's a 510-t or what, I can't tell you where else to get them.
If it is a 510-t, you can get them lots of places. Also, if it's a 510-t, I prefer to drip on them anyway. That way there's no problem with wicking. That's the only way I ever use my 510-t atties.