Help!!!!! My couch!!!

So I have this long couch. Its one of those couches where you have the metal slips on the bottom and you hook the rest of the couch pieces to the other ones. Its not a wrap around but it covers the whole wall except for a couple inches on each side. It has a couole rough spots on it and I need a couch cover I dont know if there is one that can be made for it......advice please !! What can I use!?!?!?!