Trying to add some attachment points to a plastic cab

[WCarp]

I need to add two more attachment points, to fix a poor design, one each on the long side in the center between two existing points to a plastic material on a cab of a tractor. Since the manufacturer did not properly space the bolts that attach an access cover to the cab, the thin plastic access cover ~0.1 inches thick bows substantially between the bolts which are spaced 16.5 inches apart as a result of the pressure of the ultra-soft neoprene sealing gasket (.75 inches W x .5 inches H) which then creates a sealing issue. The plastic material at the front of the access hole is 0.150 inches and the plastic thickness at the rear of the access hole is 0.137 inches thick.

Does anyone have any ideas to resolve this issue? I have thought about gluing either a metal or perhaps plastic piece .75 inches wide to the underside of the cab but the glued surface area would have to be made to conform very closely to the curved lip at the edge of the hole so the glue or epoxy would hold well.


Does anyone have any suggestions on how to resolve this problem? A major problem is that I cannot find a way on this forum that allows me to attach photos that are on my computer to show the issues!

Thanks