HOCK TOOLS Blades and Such for Planes and More
Here are the specs for our breakers so you can check if one will fit your non-Stanley/Record plane. Craftsman? Union? Millers Falls? Philip Morris? (Be sure to check the distance from the sharp edge of the breaker to the little rectangular adjuster-slot -- the topmost dimension in the drawings -- it's critical):

BK175 -- 1 3/4" wide for #3

BK200 -- 2" wide for #4 & 5

BK238 -- 2 3/8" wide for #4.5, 5.5, 6 & 7

BK262 -- 2 5/8" wide for #8