Help! I oversaw the installation of my daughter's bathroom in 2005 (!) but it now needs the bath replaced

. The bath is "tiled in" on 2 sides down to a few mm of the top of the bath and the sealant will need to be cut out. There is the risk that tiles may crack when the bath is removed and I thought, no problem, have a look on the web - something similar will appear!
But NO! the tiles were "Topps tiles Himalayan Everest - 51001, 330 mm x 160 mm".
When I look on the web for tiles of this size - they do not exist. Tiles seem smaller or larger but not that "imperial derived size" (12" x 6" approx.). I did have a few spares but used them to make a skirting board.
Can anybody suggest a source or a remedy please? Thanks, Mel
