alovingmommyof3 - Here's the best price I've found on a box of five Boge 510 empty cartomizers with soft caps - $7.95. They will fit your eGo and are much less hassle to fill and refill than the eGo Mega cartomizers that have a tapered mouthpiece.
510 BOGE SOFT CAP Blank Cartomizers
They ship the same day from Avis, PA. I'm in no way affiliated with any e-cig supplier. This is where I've been buying my cartos, and I've had no problems with them.
Yep I have both the rubber capped 510 cartos and the XL ego cartos... I love my XL ego cartos.. I take 30 minutes a day and fill 2 of them and they are good for about 6-8 hours of vaping each.. I use the rubber cap 510s as back ups in case I am out and run low in the XLs... The XLs are easier to pull/hit IMO.. the 510 ones are harder to pull through/hit.. I want to try some rubber capped LR 510 cartos though cause the rubber capped ones are easier to mess with..