Lightroom only exports 16:9 !

Thats video, I'm making my own workflow with stills.
For proper anamorphic it would be a nice option to export out in 4:3 rather than Canon's 3:2...

This is my current workflow, and I'm quite happy with it.

Canon 5D mkIII (RAW 5760 x 3840 3:2 - which is over 4K resolution)
> LRTimelapse (Initialise, Define Work Area, Keyframe)
> Lightroom (Correct Keyframes)
> LRTimelapse (Auto transition, maybe deflicker)
> Lightroom (Export all images as graded 4K 24bit 16:9 72dpi JPEGs)
> Virtual Dub (Desqueeze & Export)

It would be nice to choose 4:3 aspect at the first LRT stage, as 3:2 is wider and reveals issues at the edge of frame forcing me to either crop in manually in Lightroom or choose a longer lens to shoot on.

You can turn off the initial 16:9 crop in LRtimelapse's settings.