Those are really beautiful.
But actually, we looked long and hard for near-equivalents of the artisanal tiles that the kabbess originally found, which were the ones that were preposterously expensive. All of the ones you see are not too bad. I mean, they aren't Topps Tiles prices but neither are they hundreds of pounds per square metre (I've actually got a horrible feeling that the original ones she wanted may even have been £580 per square foot rather than square metre).
I seem to remember that the bathroom floor and en suite wall tiles came from
Fired Earth. The kitchen ones that are seriously lovely came from Ireland and were dirt cheap -- something well less than a fiver a tile, I think. I'm sure I remember the entire batch being less than £50 in total. The en suite floor tiles were also surprisingly cheap but I don't remember where they came from.
If you keep at it, you may well find something a bit more mass produced that isn't quite as nice as those blue star ones but are not
too far off and a fraction of the price.