Do you have the small horizontal window that is rectangular but has an oval looking insert on the outside? If so that is a Hehr Standard type window. Here is a photo of one in my Boler
(Okay, I can no longer figure out how to insert a photo along with my text, so the photo is at the bottom.)
Vintage Trailer Supply sells an operator that is not exactly like the original but that they say fits that type window. I would just check with them about the distance between the mounting screws to make sure that is the same. Here is a link to it:
Hehr 008-101 Vent Window Operator
Here is a photo of the inside of the window from their website, although this particular Hehr window is slightly taller. It looks very similar to mine though.
(This photo is below too.)
Other parts that they sell which are associated with the window operating mechanism for these windows
are the Nylon Friction Pad (the arm rides on this inside the track on the tilting part of the window; the Back Frame Grommet (runs vertically up the middle of the non-operable part of the window -- this and the crank operator sandwich the screening).
For these same windows
they sell a few other parts too:
Backframe Gasket, which is the rubber gasket that seals the window to the camper on the sides and bottom; Hehr Standard Glass Seal, which runs around the oval on the outside; Hehr Standard Window Fasteners, which hold the glass in; and galvanized screening.
PS: As for the door, I'm guessing Roy knows you have an older Boler - say, pre-about-1977. They do have the handles like the Scamp
doors. Some of the later 70s and up have a Bargman L-400
, which is flush with the door and has a flat panel that you pull on to open the door.
I've also attached photos of both of those (Below!)
On the Scamp-type ones, that are like an arm, I've seen them both vertically and horizontally installed.