Pleasureway made very similar windows and they are still in business. I measured them years ago and they were close enough to work. I ended up ordering a Roadtrek window before they went out of business.
Getting a window out of Pleasureway will take some effort. Their parts department, like Roadtrek’s at the time, won’t talk to you without a VIN number which you don’t have.
First you will have to find the year and model Pleasureway that has a window that is a match. Getting a VIN number would help but they will soon discover you don’t own it. I found that such existed. Then you have to convince them to sell you one.
I wanted the Pleasureway window because I thought it was a better, less fragile, design.
The original window was made by RL Lawrence, I think, but Roadtrek would not allow them to sell to you directly because it was their design. If you browse RL Lawrence’s catalogue you might find something.
Just a few ideas.
Keep in mind left and right are different sizes.