If you're at all handy and have the basic tools (table saw/router etc) you can make one yourself out of Starboard or Seaboard. It machines quite nicely, esp with a router. The other advantage is you can maximize your available space rather than accept a table that happens to be available and 'might' fit.
Critical dimensions are height from binnacle attachment point to cockpit sole vs the radius that will clear the bridge deck, if present. Also if you make it with folding wings the 'opened' table will be larger than what your can probably get away with in one piece. Another advantage of Starboard is that you don't ever need to worry about varnishing!
I'm currently in the process of building another for our current boat.
Here's one I made for a previous boat: