Storm & Screen Window Channel Locks or Bolts

I have several aluminum storm windows and screens in my 118 year old house that need to have the channel locks replaced. The pictures show clear markings "Permalum" and "El Dorado" which I assume is the brand and model number of the triple tracks. What's missing from the items in the pictures are the 1/2" extensions that hold the window or screen in place...
This might be a great application for a company with a 3D printer as I'm not sure how easy it will be to find actual parts.
I have a good hardware store who can change out the parts (we cannibalized some spares from windows we replaced)so I only need the parts. Probably about 25 total.

Thanks. I have a screen window and can have the hardware store take it apart for me to take a pic of the undamaged hardware. I can also produce a drawing of size specs. I'll look at the list you provided Dave. Thanks so much.