IIRC the capacity of a 145 is about 48-50 pax, so that should fit the bill, and improve load factors (which might also push up fares).
The useful things would be an early start / late back flight. And maybe some less crazy fuel surcharges.
Frankfurt used so sit around 50-60 pax per flight, on 3x daily, so that's a fair indication of demand. KL seem to fill the Fokkers, but only by use of apparently very (unsustainably?) cheap fares.