I'd try asking at a real plumbing supply place, they can probably search for you based on the size. You can also have the hole made bigger or reshaped fairly reasonably by a granite fabricator (or DIY if you're up for a mess). Making it smaller would be harder ;-)

I'm sure it is not the exact same tile, but you might look at Fireclay Tile's handpainted collections; Spanish Cross and Barella have similar shapes. You can customize the colors to approximate the look of your inspiration pic. https://www.fireclaytile.com/handpainted/patterns?collection[]=classic-cuerda-seca&collection[]=moroccan&collection[]=mediterranean

West Elm and paint? https://www.westelm.com/products/reclaimed-wood-lacquer-media-console-h2110/?cm_src=consoles-media-storage-cabinets||NoFacet--NoFacet---_-&isx=0.0.10846.857421875

I also got Kidde smoke alarms (a six pack….with NO carbon monoxide detectors)….i12010s (purchased on Amazon Kidde Smoke Detector, Hardwired Smoke Alarm with Lithium Battery Backup, Interconnect, Test-Silence Button, Pack of 6 https://a.co/d/gADrm0o). These alarms have permanently installed 10 year batteries so no changing batteries for ten years! When the batteries die, you simply replace the entire unit. No wiring necessary just plug in the pin connector and you’re good to go. My old mounting plates will need to be removed and the new mounting plates (which are included with the new alarms) will be installed. It’s a simple matter of removing the old plates and screwing the new plates into the ceiling. The pin connection is the same so no problem there. But since you have First Alert, if you change brands you will need to find out if they use the same pin connectors. If not, you will have to re-wire with the proper connector (electrician needed if you can’t do it yourself). So, my advice would be to look for alarms with 10 year batteries that are reliable and that have the same pin connector as you already have. Just got six replacements (with 10 year batteries) the other day ready to be installed. I have several detectors that were malfunctioning and they would ALWAYs start beeping in the middle of the night and ALWAYS when my husband was out of the country! Such a pain. Btw, ANY smoke alarm has a limited lifespan and usually start to malfunction after 8-10 years and will need to be replaced.