Anderson patio door Lock 2573558 / 7700-14 and latch
Unfortunately the 2573558 is obsolete, but fortunately it can be replaced with our 82-037 Anderson Reachout Deadlock Assembly. Take a look and let us know if you have further questions.
Thanks for reaching out to us. That code is commonly associated with the 82-037, but that's far from a guarantee. A photo would allow me to better advise on what product will work.
I'm also not sure about the bar you mention, but it sounds like it might be the tail of the thumb lever. That's an entirely different part, though, and if that's all that broke then your mortise may be in working condition. Photos would really help clarify matters. Would that be something you could upload to this page?
If the thumb lever is what broke, then that's what needs to be replaced. I'd be happy to help, though I will need a photo of the original parts in order to recommend a match.