I am not sure about EBII wagons, but my uncle & aunty own a column-shift ED wagon coz they have 4 kids.
I'm not sure about bench seats, but I think the front of this ED is two normal bucket seats & a small "insert" seat where the centre console would normally be. The "insert" looked a bit like a rear-seat armrest (it could be folded down when not used... like the inverse to an armrest), but wider & with a lap seatbelt to seat a passenger (obviously not a 6 foot 80kg adult).
You can look into dickie seats too, as you mentioned, but they take up the cargo area :(
'91 EB Fairmont Ghia V8.
Pacemaker PH4000 extractors
Meaty semi-twin system
AUII XR8 t/b & maf, ELGT snorkel
BA semi-manual shifter conversion
Electronic shift kit
4.11 Hydratrak LSD
Explorer intake manifold
Contra 16x9 rims, rubber: 225(f)/245(r)
Chiptorque HP2 chip
ET: 14.78 @ 91.48mph, 137rwkw!