Agri Fab makes what they call a cultivator, but does work as a "chisel" plow. Buddy of mine picked up a used one this year. (The one that I help farm.) He said it works pretty good. Take the POS depth control things off of it, and it will go in the ground. It's not great.... but it's better than the one you got. At least it has two rows, so it can pass more trash, and it will go in the ground deeper. He did break one of the chisels because he caught a root. Things I don't like about it are the chisels have no changeable shovels/points on them. They aren't even drilled for them, so when the wear out, they are done. They also obviously aren't very hard, as he broke one. BUT.... better than the other.
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Here is what you need.....
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