[model murdering]

Knee jerk:

Short of direct replacements for the old bar magnets, later Tycopro magnets MAY be a possibility. Although their faces are contoured, the backside is flat. (for sanding, should the fitment be a hair off).

I'll have to rummage around in my box of vintage box motors tonight and see. Several manufacturers of the era used this design.

Edit: Temporarily? Flexible refrigerator magnets, perhaps. The trade marked product was called "fasson" in my day. Easily sliced, diced, and glued. As those armatures are whimpy anyway, it may be about the right balance.

 

[model murdering]

Follow up and reality check. Doh!

It 'd been a while since I'd had one of these old timers apart. The retainer clamps arent re-useable. I broke four of four for a perfect score. I've got a trick for securing the commbox to the motor frame after you kill one taking it apart.

Due to the design of the one piece plastic combox and magnet retainer/pockets, only flat bar magnets will work.

 

[model murdering]

The original magnets arent exacly black hole generators.