Can you get new sealing panels or just have them recovered????

Here is a replacement ceiling I installed recently. It is fiberglass material 4 x 8 sheets
1/8 in thick. It is smooth on one side and pebbled on theother. It is available in most
lumber yards. I used the old panel to cut new to size. It is water proof, washable. The best thing was it was only about $8 a sheet.

Nice. But how do you get the rods into the holder? are they all the same length? or is there more clearance between the holder and the windshield than it looks in this photo?

I'll answer two responses on the same posting. re the rod holder, it was on the boat when I got it, I have not used it for rods, just the boat hook. The two pieces are far enough apart so a rod will fit, I dont know whether you would put the rod tip in the back piece first and the handle it the front or vice versa,
As to the name of the ceiling material, I don't recall. I think it is sold as shower walls, or for other wet locations. It took two people to hold it up when screwing in place because of it's thinness, it was like handling spagetti. It didn't threaten to break when holding it in the center, I'm happy with the results as the original stuff was a thin plywood covered with vinyl and water had leaked into it in one front corner and the plywood rotted. This wont rot.

What you are talking about is FRP (short for fiberglass reinforced plastic ) any good lumber yard will have it and glue and decorative fastners. It is normally put up over plywood for strength. Strong by itself but limber.

I wanted to do the same for my overheads but the cabin is 8 feet 1 inch wide and the salon has the 2 inch pipe at the helm station deck to overhead that would add another seam .