I would build your own table with an adjustable baseboard, so you can print just about any size prints you want. I got the idea out of a "Build Your Own Darkroom" book then made it larger for my application. I built it out of 3/4 inch plywood and it probably cost a couple of hundred dollars and took half a day to build. You can easily bolt it to the top of the table and then use picture wire to anchor the top to the wall for added stability. Mine is rock solid and only moves in an earthquake. I have a Zone VI 5x7 and a Beseler 6x6 mounted this way.
If you need plans I could email you the page from the book.