EGA Pixels 1:1.2

I would like to make something that looks like EGA (16 colors, 320x200, pixel aspect ratio 1:1.2)

Is there a way to get Aseprite to do pixels with a pixel aspect ratio of 1:1.2?

thank you!

(If not I humbly submit this suggestion, thank you)

(also any suggestions for other tools that do this are welcome too, thank you.)