Looking for replacement tiles

Hello All.

I have recently purchased a property for a client with two hip replacements. For safety reasons, we are going to have to remove the bath under the shower. We plan to re-tile it and put in a glass shower screen. The bathroom is just over three years old, but the tiles are no longer manufactured. I normally use the Tile Library in Perth, but they only have a single tile left and I will need around 40 (its a big bath)

Can anybody out there recommend a good source for discontinued tiles.

Thanks

David Hall