Ooooo... Hate the color and would never be able to match it to fill in, but even if I could, the manufacturer of the hexagon shaped floor tile went out of business about 20 years ago according to a local tile place.
What we did was remove a stand up shower and closet in my dad's basement and replace them with a remodel type tub unit. We now have an 8" x room length trough where we will need to fill in tile. That includes down one wall, across the floor, and up the other wall. I'd love to draw you a picture, but can't see any way to attach an image on this bb.
Also, because the ceiling is so low, I want them to ceramic tile the ceiling above the tub. Right now they have those white, staple up ceiling tiles which they plan to paint with DryLoc or something similar.
I got an estimate on the tile refinishing and my dad and husband are balking at the price.
I don't know how they did bathrooms in your area in the 60's but here, for the walls, they took this metal mesh stuff and slathered it with cement and kept doing that until they had a smooth surface about an inch thick. Then they poured about an inch and a half of concrete on the floor and smoothed that out as well. THEN they layed the tile on that surface.
We've already torn out one bathroom at our house about 7 years ago and the shower and closet wall in this house. I don't know how you think that is fun. We ended up with lots of small cuts and really sore muscles and dust everywhere.
They don't want to tear all that out. I suggested that maybe I could get a chisel and pop the tiles off and then they could go from there, but they nixed that idea. I just want it done right where it doesn't look bad and they're looking for the fastest, cheapest, easiest way out. BTW, they is my dad and husband.