I did see a few of those Push-a-matic three phase panels. They had two sets of parallel bus bars (A/B and B/C), but I never saw how they could accommodate a three-phase circuit. Maybe that is what let to the demise of their design.
The Bryant quads were pretty popular in these parts with their 'double 30' design; one for the oven and the other for the cooktop. The other manufacturer's variations are still widely popular here for the same use.
Siemens/ITE,C-H,& GE,are common, but the GE supply house dropped them in favor of Siemens,so GE will be rare now, SQ D never had a local supplier until a few years ago, so they were a "import" but there is still a large installed base of Cutler-Hammer XO panels & Zinsco/Sylvania/Challenger was popular in multi-family, & tract homes, & other places where cheap is normal.
Super rare is ITE Pushmatic,& some FPE.
Did Rexel dump GE all over? They did buy the West Coast chain, Platt & the supply house Platt bought was a long time ITE & later Siemens dist. so 2 Rexel owned distributers sell Siemens now, and am wondering if one will be closed........
Where in north NJ did you live? I am in Morris county and around here not only was there a lot of FPE, but we had Murray, Zinsco, Wordsworth, ITE, Cut-Ham, Square D, I think, they all made it here. I used to have to carry at least a couple dozen breakers in my truck when we went out on service calls here. Now these days it is what the big box stores carry. Square D, Cut-Ham, and some ITE. That last one is because we still have a local supply house that carries it.