I believe such a routine has never been made. It may be possible to modify the existing scaled sprite Axiom to do that, though, especially if all you need is horizontal downscaling.

Realistically, that would be nearly impossible. So unless you're planning on learning z80 assembly, you'd probably need to recruit someone to produce the code for you. If you do in fact only need downscaling in one direction, it doesn't sound like it would be a huge undertaking, as one would just need to cut out the downscaling logic for the other direction from the existing scaled sprite Axiom. Or, it could be generalized to support separate horizontal and vertical scaling factors, and you'd just use a factor of 1.0 for one of them.

To clarify... just downscaling? Because the existing Axiom only supports downscaling, not upscaling.

If that's the case, I could perhaps give modifying the Axiom a try tomorrow.

Alright, so as far as I can tell, the modification was successful. It uses the same tokens and input format as the original Axiom, but each token now starts with an "H." Some weird OS behavior that I can't explain may make the "ZoomFit" token not be replaced with "HScaledClip-On(" in menus, but it should otherwise work correctly.

The Axiom and its source are attached to this post. Let me know how it goes!