Oran Double-hung slider hardware
Thanks for your patience during this busy season. These pivot bars are very old, yes. These are specifically Harvey brand parts and they haven't been made in a long time.
We may still have options for you, but they're not guaranteed. For the first pivot bar, the long straight one, see our 26-444. I've actually had customers in the past tell me that they got this to work, but it may take some alterations on your part for it to fit. I've had some reports that filing down the "neck" was necessary, since it was otherwise a little too thick.
The second pivot bar with the hoop on the back end is going to be a lot tougher. The only part we sell that's remotely close is our 26-164, and while I think this will engage with the pivot shoe easily enough it's not going to fit in the sash the same way. The cavity where it seats is just too specifically contoured to the shape of the original. I'd imagine it'd take some serious retrofitting to get the newer style 26-164 to work in this window. You may want the help of a professional for that.