hell, you could build one... 2x4s ain't expensive, get some AC plywood and maybe a veneer for the top, some 1x6 could act at faux doors. Keep the A side of your plywood out and paint it when you are done, or veneer. Just frame out a box basically and you can make it look like a piece of furniture.
you can also hit up Lowes or Home Depot and check out their prebuilt cabinets. they have white ones that go together with minimal tools and are fairly cheap. I think they have up to 42" wide bases (sink base is what you prolly want to look for). If you get those, they normally don't come with a countertop, so you'll need some plywood and whatever sort of moulding you want to use around the edges... or just square them off.
Example of how I've done countertops for a customer's home...
Assemble cabinet, and measure the top of your cabinet.
Attach cabinet to the wall (completely up to you on this one)
Cut a sheet of 3/4 particle board to fit the top of the counter, plus a little extra for overhang( up to you on your overhang).
Attach it with screws to the sink base
Cut a sheet of 3/4 ACX plywood to match your Particle board.
Attach to the particle board
Trimming the edge and the top are up to your preference, a 1/2"x2" piece of fir or your preffered wood can cap the ends.
They sell wood veneer for the top of the counter if you want a wood look, or you could go with whatever top for it you want. The A side of the plywood is a smooth surface and I wager you could paint to match your cabinet.
the 2 pieces of sheet material (plywood) are what I used in a residential home. Not sure if it was a building code thing or my boss being interested in beefy looking countertops. It's all up to you, but there's a process for possibly getting it done.
Oh, and when it gets past the structural part, I prolly can't help you, someone else may be able to provide info on the fans and such that you may need. The backs of those cabinets are easy to drill out for wires though.
DANKIE!! you beat me to it, but my info still stands
