Discontinued H&R Johnson 'Flutter' Tiles (10"x6") - Where to find?

[SpirituaLee]

Hi all, I'd register, but I don't think I'd be an active participant in the forums, over above this plea for help!

I'm looking to source some H&R Johnson Tiles, fitted in my mum's new build bungalow bathroom in 1991.

Having emailed Johnson's, they advised they no longer have a stock, but suggested I contact Dominion, who've also no stock of this tile.

Could anyone suggest where I may be most likely to find some?

Thanks so much!

Lee