Sure. But there aren't a lot of choices at this point and it's an ever-dwindling, or at best a niche, market, so no manufacturer is going to put their best efforts into them. (For example, I haven't specifically looked, but offhand I don't recall ever seeing a "dumb" 4k TV at all.) Also, fwiw, few if any major "review sites" even mention them except occasionally in passing, let alone actually test/review them...
You won't find dumb equivalents of the "newest, latest, and greatest" models, but in general they're available pretty much everywhere smart TVs are sold. If you have anything specific in mind, your best bet is to look at manufacturers' websites for their full product lines, and then search the web for specific models, although you probably won't find discontinued models listed in the "products" section of those sites, just the support areas.)