They're fiberglass roofed, not rubber.
Can you give us some more information about the "collapsed" front and rear sections? Are they visible from the inside or outside of the MH? If you're talking about the end caps then it may very well be a big project restoration depending on the extent of the damage. If it's water damage then it could be even worse then what you see.
I have a 1992 36' LY that I had to do quite a bit of restoration in order to make it road worthy. If you don't end up picking it up, then see if the guy wants to part it out. Might be a few here that could take some of the parts.