Seasonshield window operator

I have multiple windows that need replacement parts. They are Seasonshield windows. No longer in business. Bought by JeldWen and they say they have no parts. I'm looking for replacement or parts that could be adapted. The property is on the ocean shore so rust has damaged all parts. The pictures are some of the better ones! I need opening mechanisms, tracks, and top & bottom support bars (sliding). Let me know if you have any parts or ideas. Thanks, Allan

Thanks for your help. Your suggestions look correct. I will buy one of each and try them out on my next trip. I will let you know the outcome and if successful, I will order more.

Your recommendation worked! I have ordered more of each as well as 2 bar hinge sets, clips, kerf sweeps, screws, and handles. Thanks for your help with this.