Try Roland, I have a supplier that owns one such model - (VersaCAMM SP-540i), I have seen it in action, cuts labels, prints banners etc. and is very robust and sturdy. What you do have to be aware of however, is what you want the machine to do, that will be an important question before they just hop in and buy one, there is some home work to be done there. eg. the stock you will/want to print on. The other fact to consider is that most of these printers will use material that comes on a "roll", so when they say from A5 to A0 is a matter of where it will print on the roll, the economics of the job will depend on what size rolls you will use to do the most common jobs required if you get my meaning, anyway here is the url below, all the best with your quest

http://www.rolanddga.com/products/printers/