I have an A3+ printer which will print over the edge of A4 so it should do what you want. If you are printing on A5 you shouldn't have any problem with an A4 printer, just lie to it when setting the page size or do a custom page size. An A3 laser printer sounds very expensive especially a laser colour printer.
Actually I have never tried it as have no need of it. I believe most modern Epson printers can do it. Mine does say that it may degrade in quality near the edges and, of course, it says you should use special paper.