20x30" square opening in trailer - how to cover?

[montrose818]

I am pretty new to trailers and not very creative. Had a set of speakers that was installed inside facing out, removed them, left with a square hole. All windows I see have rounded corners - the opening is square with steel beams around it. I dont want to cut a bigger oval oprning because I dont want to cut into the tubing. Trailer is skinned both inside and out.

Whats a decent way to cover that up? I was thinking a very dark larger plexiglass over the hole and use screws to the beams.

Thank you.

 

[Clb]

Most of the penetrations are square, measure and search for a window of like dimensionality

 

[pvkj454]

Get a sheet of the same color metal and cut a piece to fit. Trim it with some flat stock aluminum. You can also use some spray can etching primer on the trim and paint it to match.

 

[montrose818]

I think I found an rv window manufacturer who does square corner windows. I sent them dimensions and waiting for a quote.

If not, then I will go the square sheet cut to fit.

Thank you