Roof lights and bullseye windows?

[GuyT]

Having a few thoughts about a possible replacement van and am thinking I would want to install a roof light and also small side windows in the back, at the top of the side panels - preferably the rectangular windows opposed to the bullseye type. Can anyone recommend anywhere? Does anyone have any pictures of such windows installed on their own van and any recommendations, especially on the roof light.

Cheers
Guy