The idea for putting a converging lens in front of the anamorphic lens (for closer focus) then putting a diverging lens between the anamorphic lens and camera lens (to return to the original FOV) and then compensating for the focus seemed to work alright.
I'm having the hold the lenses, the rostums not quite on axis, and the anamorphic adapter seems to be on slightly wonky, so there's a fair but of work to do still.