Hydraulic lift table

[PAmizerman]

Let me know what you have 
4'x12' would be ideal 

[Crusarius]

You may want to look into get a couple smaller tables and building a top to go across both of them. a table of that size is going to be very hard to find and very expensive. 

[KirkD]

I have a motorcycle lift that is wide enough to drive a quad on. You can get them in air, hydraulic or an electric motor for the lift part. If you want the table larger you could mount a wood top over it.

Just a thought.

[farmfromkansas]

Harbor freight has a motorcycle lift that measures about 3 x 8.  I use one as a variable height work table.  Raise it up to desk height for a single board, lower it to build boxes and cabinets, lower yet for sanding a chest of drawers.