*OLD* B&D 3/4" drill needs brush holders

[jimmj43]

My drill is so old....
How old is it?
My drill is so old... it predates the use of a model number!

This is a 3/4" Black & Decker drill, and it's HEAVY!. 19 pounds.
Serial number is: 14326BD.
It has no model number. Best I can tell, it never did.
There are two brass ID plates affixed still in good condition and easily readable.
The one nearest the top identifies the drill specs: 110V, AC/DC, 7.5A, 425RPM, and included the serial number.
The one beneath it lists service locations throughout the US and shows the following patent numbers: 1245860, 57576, 1492095, 68615, 1574020, 1647396.
It needs a set of brush holders. One's broken and the other shows stress fractures.

I actually managed to get through to a warm body at Black & Decker after subduing a bloodthirsty bunch of phone bots. Not surprisingly, the lady began with, "Well, you need the model number..." When I finally convinced her it HAD no model number, she relented, took the information I had and said she'd pass it up the line. That was better than a month ago. Can you say, "zilch"?

Clichè time: "A picture is worth a thousand words"

3/4" Jacobs chuck
Two brass ID plates
Unique feature
What appears to be a countersunk screw hole toward the middle/back of the pistol grip is actually a window. A stamped disk beneath the window rotates as the trigger is pulled and locks the switch in to either "off" or "on". One pull = "on"; Another pull = "off". I'm guessing this is a safety issue so the operator will take care not to let the evil torque monster cause the drill to jump off the bench and land on his foot when he plugs it in.
Brush access cover removed
The round phenolic ring the brush holders mount to is visible here.
One brush is just barely visible
The brush holders are mounted to the underside of the phenolic ring. A brush can be seen riding on the commutator on the right/inside of the ring.

Not optimistic with this, but it can't hurt to keep my [mental] fingers crossed.

[Hindenburg]

You'd have to invent something to hold em in. Start dumpster diving and hope you find one similar. I've seen em-in dumpsters that is. Hindsight is 20/20,I'd have picked it out 2 years ago if I knew you needed them. Ha! Ha!

[jimmj43]

I'm not really equipped to do anything remotely resembling fine metal machining, so I thought about using phenolic material and my handy-dandy Dremel tool. Anybody know of a source?