I know this group can work magic..... My husband has spent millions of man hours designing a Mondrian shower room (!) only to find that the tiles he needs went out of production a month ago.
We're cream crackered from ploughing through Google pages and chasing down blind alleys, but have come up with everything we need except the following. If anyone knows any tile suppliers, that could help, we might just invite you for a shower :-)
Johnson Prismatics: PRG48 Goldcrest 10cm x 10cm (6 tiles)