That unit has reached the end of its life, I'm afraid, and should be replaced. Better to do it now, while it's still "exposed", and before you go to the expense and trouble of adding a chimney cap and facing material, than prolong the inevitable. As for determining the manufacturer, there should be some sort of metal identification placard on it, perhaps behind the hood. If there is it's likely covered in soot, which is making it hard to find. But even if you are able to determine make and model, I highly doubt you'd be able to buy replacement parts and/or accessories, OEM or aftermarket; it's just too old.

Look at our tabby stucco and there is one there. Our French decape is also a lime finish that would apply for this type application.

Hi A F! I ran across your post as I was also searching for some examples of 3D tile kitchen backsplashes, and I honestly did a double-take as I could not believe how much our spaces and ideas are alike! Absolutely love the photos you had posted, and though it’s been 9 months since this post and your project is likely complete by now, I couldn’t help but reply as the coincidence is too grand! A bit of background - we are in the process of a custom new build, and about to receive our cabinets from Barker Modern in the next few weeks. The layout of our kitchen is exactly like yours, except on the wall we will have two rows of cabinets with the top one going to ceiling. We ordered pantry style cabinets on the corners/end of the wall going floor to ceiling, so the very top row of cabinets is the same depth as the pantry cabinets on left and right side, and then the second row below those wall cabinets is the standard 12” depth. Ours are white also but matte, with the second row up top black. We too have the fireplace in the great room facing the kitchen, with a linear fireplace and recessed TV, and our fireplace was tiled with black, but 3D tiles in the shape of small triangles. :) We bought 3D tiles for our kitchen backsplash also, the Bethlehem Ivy Hill glossy white though, as we’ll have the black wall cabinets next to them at the top and the countertops also dark at the bottom. We are still waiting for our cabinets before we can even do the backsplash, but I would absolutely love to hear how the backsplash ended up working on your end and what option you went with. One thing my contractor warned me in picking the 3D tile, was possibly it looking odd in areas where outlets have to be installed given the texture of the tile. Not sure how that will work yet. I see you have outlets on the backsplash area also pretty much in the same areas we will, and I’m curious to know if that posed any issues or made the tile look odd. As for the rest of our home, we too have plans for cooler tones, minimal aspects, with extra-white walls throughout, lots of black and grey, and clean lines. Would love to see how your project turned out, and hope you are enjoying your newly renovated space!

Try to find a local mason to help. Call a nearby brickyard to get names of masons. They may be busy when you call, but later they may show up and can be really helpful! Between the mason and the brickyard, they may be able to match your brick or find an alternative that would look good. Did the contractor save the bricks from the hearth so that you might be able to reuse them? Are there any other matching bricks outside on the property? At my house, bricks were used for steps, skirt and driveway edging, where they could be dug up and cleaned if I needed more bricks. A few extras were just lying around.