All of these components are made in China, so you should have no issue ordering from a Chinese vendor.
There aren't many clearos for the 808 that I'm aware of.
There's the CE2, CE3, CE4/CE4+, and the Nano by Vision; the T4, M3, and E-Smart by Kanger; and the Tidy by Innoken. The CE2, CE3 and Tidy require a syringe to fill. I never used the CE2 or CE3, but I wasn't very impressed by the Tidy. The Nano floods very easily. I've yet to have one last more than a few days. The CE4 is technically made for the larger vGo batteries, but they will fit on any 808-threaded stick battery with no issue. I've had the best of luck with these, but after about a month they start to leak horribly. The M3 is an update on the discontinued G4 clearo, and they work pretty well. They are a bit pricey for what you get though, and it is easy to flood them and have juice leak everywhere. I've never used the T4 or E-Smart, so I can't really comment on their performance.
I've ordered from Top Vapors in China before, and they are very affordable. But I was left with no tracking information and it did take about 5 weeks to make it to the States. Fasttech is very popular around here lately as well, and you could always check out Health Cabin. Good luck.