The problem in the US at any moment now is that the postal service (and soon after, FedEx, UPS, and DHL) are not going to deliver vape mail.
I'm not sure if anyone is positive what those dates are, I know I'm not, but it's going to be any day now.
Also, Paypal has severed relationships with most of the Chinese vendors we vapers have used over the last ten or so years, and many of them are not set up to take credit cards directly. I believe you also have limited recourse if you use a US credit card with a Chinese vendor and something goes wrong with the transaction.
Best alternative I've seen is to use Paypal to buy gift certificates from FastTech.com, and then use those certificates to buy your merchandise. But I'm not betting any more that shipments of vape gear from China won't be seized by US Customs.
Short answer is that, right now, most of us just don't know. You can always check our Trading Post and Resources section to see if anyone has anything listed for sale that you need, and you can make a WTB (want-to-buy) post and list what you need. Maybe someone has extras or has stopped using coils that you are looking for.