I found two suppliers of
legal vaping gear.
https://medipen.co/ - a blend of cannabis oil (THC removed) and coconut oil
https://kanavape.com/ - hemp oil (lower CBD strength)
I bought a Medipen because it has much more of the effective ingredient for only slightly more money.
Both are expensive !
Medipen 1ml cartridges cost £24.97 each
Bottles for refills are not available