Thanks T. Bought it 2nd hand at a shopfitters. They had heaps of old cases. Wanted one with glass ends, but the glass-ended ones weren't long enough! Had mirrors made for the back doors, just two big pieces of mirror. It was expensive, I probably could have done better with patience, but .... $650. My wife painted it blue inside, and did a streaked stainless effect outside, and I added some aluminum tread plate at the front as a kick plate, used big hex bolts.
I figured a desktop case would be $350+ anyway...
NZ - big printers are handy! You really will need one for all your drawings!