Triangular 20-Degree Angle Window Replacement

[kid tulocay]

I have a triangular aluminum-frame window (part of a trapezoidal window wall system) with a 20 degree angle at the pointy end. I would like to replace it with something newer and nicer, but I am told nobody makes a 20 degree one. 30 degrees seems to be the minimum. Anyone know why this is the case, or who makes a 20 degree one? The existing windows are Alenco bronze aluminum-frame non-thermally broken, about 25 years old.

[Randy]

For vinyl windows the angle can be extremely difficult, if not impossible, to get into the welder to seal the corners.

For aluminum windows the sharp angles prohibit alignment of the screw boss's.

[Windows on Washington]

Shapes are tough for the reasons that Randy cited.

How many of this unit are there?

[TheWindowNerd]

Newer why? What do you mean by nicer?
I know you can do it with clad wood windows like Pella , Marvin or Andersen. They have direct set picture window that can do this.
I will check with my vinyl vendor to see if they can do it.

[TheWindowNerd]

could not get an answer for vinyl.
What are the base and height?