That's a tough one. I've never looked for 401 flavored pre fills. Wouldn't it be just as easy to fill the required amount of carts, and pack them?
I travel extensively, and always take two 30ml bottles of
juice in my carry-on. They go in the TSA required baggie. No problems at all.
If I run across pre filled flavored carts, I'll let ya know.
Cheers;
jd