Window does not stay open.
Looks like you need new pivot bars, but I'm afraid the originals are too corroded to ID. Do you have another window in the house that might have these components still intact? If so, we need to review those.
Sorry, I'm a little confused. I thought you needed pivot bars, which is what I asked to see. Did you also need the balance and pivot shoe? That's what you're showing me here.
The balance could be a match for either our 3/8" diameter Series 900 or the 9/16" diameter Series 600. We cannot garner precise size from a photo of a tape measure, so you need to carefully measure your tube diameter to verify which of these is the best match.
Regarding the pivot shoe, there could be many, many possible options. I would need to know how thick the original is to find a match. To reiterate what I said before, all dimensions must be written out in your response.
Lastly, i still don't know what the pivot bar would be. I highly recommend you check other windows in your house to find one that's still intact.