Apologies for resurrecting an old post, but it contains pertinent information that I need some further advice about, and thought this would be the simplest means of compiling all the previously supplied data with my new question.
Additionally, it would be very beneficial to me if Jeremy (OP) was able to update the post with his findings. (I hate cliff hangers)
My 2000 Patriot Thunder did not come equipped with a ladder.

This is troubling to me on a number of fronts from roadside emergency access, to convenient access for periodic maintenance.
Near the top of my "to do" list is installing a ladder. I appreciate the previous respondents posts and have found them most helpful.
What I would like to know is:
Does the first attached picture illustrate the "thicker/reinforced" area for ladder installation discussed in previous posts? PHOTOS were rotated to the left upon upload for some reason. Just tilt your head to the left and it'll be clear.

(this photo taken looking up into the engine bay, just above the engine hatch, on the driver side)
The second photo is provided for comparison and is of the same area and perspective only of the passenger side.
On a side note, I called BCS yesterday and spoke with Matt regarding this matter and he informed me that Monaco didn't keep any of the illustrated parts breakdown diagrams for coaches older than 2002. But that he has been busy scanning evvery old tech pub he comes across for the archive. (kudos to Matt!)
He said the ladder PRT# he had for my coach looked to be a Topline TL7 042. Which of course, is an obsolete number with no superseding number provided by Topline.
Matt said he's not completely sure he could even get one of these anymore as the last one he recalled getting was for a customer in 2014 and it was with difficulty and the part was around $500.
If this is the case, perhaps we can combine all these ladder related posts and make them a "sticky topic" for future members to be able to access in the tech question section in order to avoid rehashing the same info over and over?