Hi Mark,
I know there are some in The Netherlands, but not being a liquid buying type (I do squeeze the excess liquids out of empty/near empty cartridges, which I believe most users do), I don’t know whether they sell internationally, I’ll look into it and let you know what I find out.
I do know however, that some people, who have better experiences with dripping as opposed to using cartridges, just squeeze out full cartridges into an eye dropper bottle using a syringe, to gain the liquid. Would that be something that would work for you ?
Another reason why people may do this is because of the warranty. In the case of Sedansa (www.sedansa.be {sorry, for some reason I couldn’t get it to come out as a clickable link :-/}) for instance, they offer a five year warranty on their ‘hardware’ (yes, you read right, that’s FIVE years !! They’re the only ones I have found so far that are that confident about their product) with the stipulation that you can use the dripping method as long as you only drip with the original liquid used in their cartridges. They do not sell the liquid separately.
Cheers,
Silver