Do you still have the old one? If you just need to fix a few cracks or patch a few broken out pieces just take it off turn it upside down and put 2 layers of fiberglass cloth and resin on the inside and keep using it.
Using this method I re-enforced my two and fixed my sons broken one.
2001 Sea View 31' F53 1 slide 8310 133,000+mi
2012 Jeep Liberty Smi stay and play Duo brake system
Security by Bentley, KF6HCH, God Bless