Trust me they won't be easy to clean. It scares me thinking about this. Next time I'm going to minimise grout in the splash back choice if possible as this is the part that is hard to clean so bigger tiles are better and definitely gloss finish for ease too. Good luck.

Hi Sue, I think it would look amazing if you used some tiles with a bit of texture. The wood look tiles that are popular at the moment would be an example. If you chose a colour that toned in with your floor you would get a really nice cohesive look but with a bit of interest. I've attached a photo of a recent design of mine as an example. Just a suggestion!

I think a dark grey grout would look great, the wider the gap the more the tiles stand out, if it wouldn't cost too much and you had some spare tiles you could do a mock up on a piece of board , sometimes the only way to really gauge things is to actually see it

Sadly as tiles are considered a fashion item by the manufacturers you would be very lucky to source the same tile so long after it was made, and been in fashion. Having the luck to source that tile as new-old stock would be the same sort of luck you need to win Tattslotto. Most mainstream tile suppliers will not carry stock like that as it is not currently fashionable. I can point you in the direction of a niche Melbourne supplier who I regularly use for clients who are renovating their 1960s and 1970s home and who want to use tiles that are appropriate for their original homes. While these tiles are very similar handmade tiles to yours, they are not exactly the same. https://www.urbanedgeceramics.com.au/component/igallery/brands/fifth-element-handmade-tiles/fe-clay-brick?Itemid=108 Best of luck, they are great quality tiles, and will last forever. Dr Retro of Dr Retro House Calls