I took a look at their website. It looks like the cartos are a 510 connection. You could try getting a pack of Blu cartomizers at Walgreens or order them online Or sites like Volcano and another company called Jet sells 510 cartomizers.
According to Manta, they (lotuscigs) are based out of Boise, ID and have annual revenue between 5 and 10 million with 19 employees, you'd think you'd find more about them. They sure have some interesting sounding flavors. I did see one youtube video review from some guy who was trying one because his company was supposedly interested in distributing them. Other than that, I didn't find out a thing about them. There are some phone numbers on their site, so you could give them a call.