A 1x2 or earlier headlights will not fit your 104.
Other models that headlights would interchange to your 104 include 72, 105, 124, 125.
Even headlights from a 73, 106, 107, 126, 127, or 147 will fit. BUT, they will have the extra square retainer/decorative piece around the front of them and isn't considered "correct", but they will fit. (I'm sure the correct police will be ALL over that comment...)
Hope this helps
