I don't have any finished product recommendations, but I came in to say that it's actually a pretty cheap and easy DIY project to make a felt gaming table or table topper. My table topper is just a 8'x4'x3/4" plywood sheet with a thin felt-like fabric stretched over it and stabled to the bottom. This rests on top of a cheap 3.5'x7' pool table. A small step up would be to add a 1/4" layer of foam rubber under the felt, glued to the wood and mounting the topper on a set of banquet table legs. Ideally you would also cut the board down to 3.5' or 3' wide and 6' or 7' long and round the edges somehow. Other projects I've seen have split the board into 3 sections and felted them individually so they can be easily placed on and removed from a standard dining room table.
There are lots of examples of this level of project documented on the boardgames subreddit and Board Game Geek, which are also good places to look for finished table recommendations (though the good ones will be much more expensive than a DIY solution) and just get general news and discussion about tabletop games.