Done a bunch of home remodels myself...If it were me, I would fix it myself, and soend the savings on a camping trip!!...I see this as maybe butt ugly but I don’t see this as terminal...I would make a east to west very shallow cut (no greater than 1/8” to avoid the aluminum stringers) just aft of the front cap radius (on the under-cab), remove the entire panel (which is filon atop of cheap luan plywood), eliminate the filon and replace with new luan say atop conventional 4’x8’ vinyl sheet material from a big box store then permanently cover the cut seam with a caulked trim strip ...The damage likely extends down to the vertical section beneath the cabover as well, but the process is still the same...I see no reason why this can’t be addressed by a semi-experienced DIY’er..
3 tons
