Honestly any decent tile store should have this. It is not uncommon.

I would try to steer them in a different direction though. It seems a bit dated ( depending on the style of home and kitchen layout) and like it would be really hard to clean. JMO

These were popular 20 - 25 years ago, so it might be harder to find similar rustic/tumbled Travertine, limestone or marble in showrooms right now. Visit local mid/high end tile stores in your area and if they don't have any samples, they should be able to find one of their distributors that can source something similar.

Please tell them no. Sometimes clients just need to be reined in on choices That was long ago and IMO never worked except in a Tuscan kitchen in Tuscany.

I was just looking for some other tile and came across this one:

https://www.sohostudiocorp.com/product-types/collection/tile-mosaic-collections/caruso.html

This company has nice quality tile. The porcelain would be more durable, than natural stone, for a backsplash. It comes in different sizes and colors.

The materials are still around; just not what clients generally look for these days. A good tile showroom can source what you want whether a travertine or other beige stone that work with their selections.

Lowe's even has tumbled and honed travertine tile - while it's a dated tile, there are quite a few places that sell similar tile.

Tile Bar has porcelain travertine look tile in a few different colors - also it's in a 3x12 size (which would help update the look by using a longer tile).

When I did a quick search for tumbled limestone and tumbled marble tiles, I found them offered at a few retailers.

If your client really wants this look - you can find the materials.

Are you referring to the FIELD tile in the picture, or the quite awful tile in the picture frame, and please DO skip the picture frame unless Tuscany?

https://www.tileshop.com/products/machu-picchu-tumbled-2-x-2-in-659713

You'd do very well to strongly discourage the whole look from decades past: ).

Are you a designer? Contractor? Realtor?

If insistent? This is far better

https://tileandmosaicdepot.com/products/ivory-travertine-4x4-tumbled-tile-clearance?gad_source=1&gad_campaignid=20362630994&gclid=Cj0KCQjwo63HBhCKARIsAHOHV_Vi2k-p6j7XYLc5yJJLKnI6z3u0-kJNjv3wVD5W3JDRPsMNMTNSWKIaAltTEALw_wcB