Roger
On my Patriot the ladder was broken when I got it ( looked to me like a tree limb had removed one of the top hoops )
I bought a new aftermarket replacement kit which matched the width and even though it was a shorter ladder I was able to reuse the lower section
To build an exact fit because the kits come in two pieces with a splicing hinge to allow then to fit curved rear caps , the hinges can be used in a straight line to make a splice as well and if the original ladder is the same width it should connect right up you just take your old ladder off lay it on the ground match up the rungs and cut and splice the new one in .
Here is a spec sheet for a Calson aftermarket unit check it out ( compare it to yours width and rung spacing and see what your think)
Like I said it worked for me and matched perfectly.
Go to the installation manual to see the specs.
https://www.strombergcarlson.com/product/universal-outdoor-rv-ladder/Hope this helps
Eric