Awesome!!! Thank you so much!!! They are all out of stock at the moment but now I know what to look for and might be able to find a UK site!!! We also found out today that we indirectly know people who make their own eliquid so we are going to go to theirs soon to check out how they do it and try some of their flavour concotions to see if he likes any!!!The PT1 and PT2 didn't come with the air flow base, but easy enough to swap out.
One source, and good pics and info:
Kanger Air Flow control Valve Base Replacements