Probably, just have to find something around a #5.
All the nib units are the same and interchange; L, LJ, SJ, transitional, pastel, desk, etc.
I've put the same Chinese nibs into a Parker Duofold Jr and Vacumatic that had broken/missing nibs. So it is likely that the reverse will work, and those Parker nibs will fit into an Esterbrook nib assembly.
Oh oh, that probably got FB upset at me
I could start selling my pens to Weimer and I'd still be selling to a Gary...but he doesn't buy Parkers so you might be safe.
If I am pushed to answer which Esterbrook is the keeper and I'm limited to production pens, I would say the red one.