So just because it doesn't say StabLoc on the outside it doesn't mean anything.
Right. Those breakers with the orange handles were a dead giveaway. StabLoc was the name of the bus design that FPE used, and I suspect that if you had taken the dead front off of that panel and taken a picture of the inside and posted it, people here would have recognized it right away as a StabLoc design.
Your panel looked newer than most of the FPE residential panels I've seen. So the deal may have been that FPE quit using the name "StabLoc" because of it getting a bad rep, but kept right on making the StabLoc design. As far as I know, FPE didn't make any residential panels that were anything other than StabLoc, at least not since the 1950s.
I got the quote down to $2570 for a square D panel with space for around 30 circuits. Around 20 breakers are included, a generator interlock and outdoor interconnect socket. Will have it in place in a couple weeks.
That's a pretty good quote for all that. And you can rest easy knowing your house is protected.