Brush caps for Skil 190

Does anyone have a source for brush caps (the big ones; brass with orange or black plastic top)? My 190, 676 and 100 all use the same caps. All could stand replacement. Thanks
I found a reference from PeteC for 5/8-27 thread. Unable to match that in search. Close, but not a match (3/8-27, 5/16-27, 1/2-27)
I think I got a couple from Pete 15-16 yrs ago.

More parts needed.
Blade adjustment screw for Model 190. The single screw for setting depth of blade.
Thanks