Missing My Skylights – Where to Find Replacements for a 2005 Thomas?

I’m writing from Germany (Cologne) and last year I bought a 2005 Thomas school bus from North Carolina. Unfortunately, my bus no longer has any roof hatches, but I’d really like to reinstall them.

I’m looking for the exact same kind of roof hatches – or more specifically, the part that goes over the hatch (I’m not sure what it’s called – maybe the cover or housing?).

Does anyone know where I could find something like this second-hand?
Any tips or links would be massively appreciated.

Thanks so much in advance!