just finished gluing with rapid-fix,I think it's going to work.I've done some repairs with it before with amazing results,including a lower radiator hose nozzle on a kubota tractor.Broke again after 4 years,reglued and it's been good for over a year now.I will post results!
Another option is E6000 glue, just use on backside with a layer of mesh either pet screen or screen door plastic/aluminum mesh. I have been using for years to either repair tracks ( basically adding height) or when I cut off paddles and went into the fiberglass core slightly. I use it on lawn mowers etc... Comes in Black or clear. Acts like silicon but is paintable if needed. Tap plastics and Home Depot finally sells it. Mike