I NEED TO USE MY LEXMARK 3-N-ONE,I LOST MY DISK IN A MOVE?

DON'T KNOW VERY MUCH ABOUT USING COMPUTERS,THE 3-N-ONE IS VERY HELPFUL,NOW I'M LOST I HAVE NO DISK TO REIN- STALL...I HAVE A GATEWAY COMPUTER AND I'M ON AOL. WOULD APPRECIATE IF SOMEONE WOULD HELP ME PUT IT BACK ON LINE. AGAIN I HAVE THE 3-IN-ONE LEXMARK ,PRINTER COPIER AND FAX.....UNABLE TO REINSTALL WITHOUT THE DISK..THE BOOK SHOWS 4200,BUT IT IS A X-4270...USES COLOR INK#PN17G0060...AND BLACK INK-0050...GODBLESS