How do you print transactions?

Hi, 

Currently we use old dot matrix printers to print 2 copy NCR sales orders. We do this because we deliver a lot of our goods using our own private truck fleet. We need a customer signature when we deliver, so one copy we keep and one copy the customer keeps. We need both copies to be filled out. We've started printing invoices using laser printers because it saves money and is much less hassle as compared to dot matrix. What do you guys use to print carbon copy forms? Thanks!