1987 300SDL headlights (low beam) not working
 

new-to-me 87 300SDL. While trying everything out I discovered I have no low beams.
list of checked possibilities:
bulbs ok (checked in daily driver)
wiggled connectors
bulb connectors are not charred or distorted
low beam fuses cleaned and tested
all other lights work (high beam, fog, driving and parking)
high beam only works in fwd locked position (no flash)

I have searched several different possibilities and havnt seen this exact issue, i am leaning towards the combination switch. any other thoughts?

also are they still available new, or does anyone have a working one they are willing to part with?