Supply line to toilet leaking

[oldscaler]

Recently purchased a 2012 Wildwood 18XLT, second owner. First owner used only couple times so trailer like new. Our first campout we noticed water on floor behind toilet so suspected the connection to the toilet at the fitting so tightened as much as could by hand. Took it out a second time and still water accumulating on floor but not dripping from connection this time. I noticed a bulge in the plastic line about 3/4 inch long right at the point that the hose comes out of the wall just above the flooring. I pulled on the line and the plastic cover that surrounds the line and covers over the opening in the wall and which was stapled to the wallboard had penetrated the water lines and was the reason for the leak. Of course once the staples pulled out of the line, the leakage problem increased to a constant dripping. Had to cut our campout short. A problem caused at the factory by the installer. The question that I would like answered is, is it possible to cut out the bulged piece of the line (about 3/4" and crimp a connector in its place instead of replacing the entire line since I believe it would be quite a major undertaking as the line is not visible under the bathtub area or anywhere else that I checked? Not sure where that line originates from in the wall area. Any info on this would be greatly appreciated.