Hy fellow Iowan. Listen to Swedishfish, as her info is great. She mentioned the Echo E which I have a lot of experience with Echos. They are fantastic.
Northwest vapor has them for $39.99 in 650,1100, and 1300mah but only 2 cartos(Echo cartos are considerd some of the best and hold 2-3ml depending on moddel. Eco E are manual like Ego and hold a bit over 2ml, Echo auto cartos hold 3ml. These never leak and last forever)
Crop Duster has them for $39.95 to $44.95 depending on options and I belive 5 cartos.
Sterling Vapor has them for $45.95 but only up to 1100mah.
Mountain Vapor has them for with 5 cartos in 650 and 1300mah but I forgot to write down the price. They are a great vendor though, and many ECF members have bought from them.
N-Haler has them for an astounding $65.00 which was like the beging price way back when.
Finaly you may try D&B Gold- The site says it is shut down temporarily, as Bill is having health problems, but if you write him he will likely have a set or two for around $35.00. May not have much of a choice as to "mah" or colors, but Bill is a solid seller, and won't do you wrong. His kits have 4cartos. I'd try this first.
Good luck. I'm in Iowa City, so I hope to see you
vaping some time. Not many of us around.