As for those hatch covers, I tried several times to glue back with various glues but to no avail as a former and top dealer for the 260.
Working with plastics, you have to cut slowly or you will melt the material with a high speed jig saw or any other kind of saw. Also you will need to follow the angle of the edges as they are designed to deflect water.
If you want to attempt this yourself, I would look locally for scraps and if near the coast, I would look thru the scrap piles at marine repair yards as you will get a better deal for scarp vs. purchasing a complete 4' X 8' section which is costly. If the scrap material is scratched, you can wet sand out and to finish off, use a slow speed buffer no faster than 1000 rpm with any good fine compound and I use to use the 3M finesse It paste type but that only comes in a gallon can which can be expensive for a small job.
Brian and Ralph, thank you for your responses gentlemen. Brian and kermit, my mountain home will be finished by the end of September. Kermit and Brian, you and others will be welcomed to stay and be prepared to be wined and dined like my family at the farm for years did. The beginning of the James River in VA is literally in my back yard with superb mt. views.