I wouldn't be so concerned in finding a bayonet that is the same manufacturer. This wouldn't have been period correct. Just like any army the soldier gets what the army gives them. For example, the soldier most likely would have had a wooden handled bayonet; however, it would have probably came from another manufacturer. I have a BYF 44 (100% Matching), yet I chose a period correct bayonet that just happened to be a 44, but it has bakelite hand grips, which would be correct for that time. The soldier of the time easily could have been issued a 43 bayonet. I feel it does add to the value, but the same maker, not necessary, just personal preference.