Alternator Locking Bolt Replacement Needed

[Lacey KZJ78]

My alternator locking bolt and adjusting bolt came loose and fell off the alternator slider bar on my KZ-TE engine while driving. The bolts are easy to find, but I haven't been able to source the square "locking nut" that holds the two bolts at 90 degrees to each other.
The alternator bolt is an 8mm and the adjusting bolt is a 6mm.
Does anyone know where I can find a replacement locking nut?
Thanks in advance for any help or advice.

 

[Squash]

Wrecking yard

 

[Lacey KZJ78]

That's a terrific idea; I notice that a few Mitsubishi's have these alternator-tensioning set-ups. Are there any other makes / models that have these? Something domestic would be easier to find...

 

[Squash]

Check any old toyota, parts are most likely the same.

 

[Lacey KZJ78]

Found an alternator tensioning "slider" from the local Toyota parts department, part #16385-17010. It is a good permanent fix, but not perfect as the original tensioning bolt is a 6mm not an 8mm on my engine.

Now to guage the belt tension...