It may also be worth visiting joinery shops that specialise in manufacturing kitchens. They drill precise rows of holes for adjustable shelves etc, and will have machinery that does that. -- @IBob

@mikey in Wellington, I recommend visiting Cut To Size in Lyall Bay. Patrick is really friendly and open to weird requests. They do a lot of work with uni students.

He made a bunch of cabinets for an exhibition I co-hosted in 2011. He let me come into the factory and contribute labour to reduce the cost.

Top dude!