vapeclub.co.uk sell a number of US brands. They do accept Paypal.
EDIT to add: If you buy from anywhere in the EU (incl UK) you'll have to contend with either tiny 10ml bottles or shortfills (which you have to add nic yourself) due to nonsensical regulations.
If you use paypal, another option may be to get a paypal credit card. Then you're not limited to paypal direct payment only and can purchase using a credit card (visa I believe it is). Funds will still come from your paypal account.