Interesting; I had no idea a 'Christian Petzold' was a composer. There is a very famous German film director by that same name, in our time.
As to the composer's works, there are 10 of them at the IMSLP website, available for free. They spelled the name as "Pezold, Christian".
See here: https://imslp.org/wiki/Category:Pezold,_Christian
Or is that a completely different composer from the same era (seems unlikely)?