Staging Dimensions could definitely make you whatever you want. I'm sure there are many other companies closer to Oakland as well. The hard part would be the
Wunderstructure-type base in 3x6 instead of 4x8 - I'm not sure that's a standard item anywhere. Unless you are hoping to get something using standard 2" legs, but at 40" or so that wouldn't be very stable and the adjustable legs are even less stable, especially with wheels. I'm assuming this is for DJ use so having it be height adjustable would be very useful - I know some DJ riders require very specific table heights (like 42", 36 and 48" being emphatically UNACCEPTABLE!). Of course you can add cross bracing but at a certain point it becomes very kludged together.