Replacing couch ?

As you can see from my sig I bought a used 5er, the unit is mint except the couch springs are loud as yell and have seen better days. It is one of the units you lift and pull forward and it drops flat as a bed. My fresh water tank hot water tank and pump are under it.

On quick review it just seems to be some lag bolts that hold the upper and lower parts of the couch in place I was just wondering being the unit is a 97 is there a site I could get a replacement from easy that will bolt right in ?

Thanks