What Can I do with my Couches?

My couch and love seat are getting pretty old and dingy, but I'm forced to move around a lot, and that seems to take a heavy toll on furniture, so I don't want to buy new ones. I tried a slipcover once, but my couch is almost 100" wide and all the slipcovers I can find fit up to 96" couches. Does anyone have any suggestions on what I can do to make them look a little nicer?