dpd1 - 3:14 am on Sep 11, 2010 (gmt 0)
Box manufacturers will hit you up for a cutting die charge if they can. Uline has decent prices for smaller quantities and may be cheaper in the long run.
I've considered doing this, but just assumed it would be very expensive. Or they would want us to get 10k or something. I would like to have long triangle boxes. They work much better than the square. But nobody seems to make them much bigger than the little white ones.