If I needed a "cow pie" breaker type harrow, or small field harrow I would do a home made implement..
Homemade because that is something I can do myself just because I can mostly..
Like the pictures in post #3 show, I would start with a somewhat universal 3pt implement frame.. And build a multi row harrow attachment to quick attach under the tool frame.. Something with multiple staggered rows of ground engaging teeth that is both replaceable teeth and can be run reversible to maximize ware and life of the cutting edges..
Now on a universal 3pt type tool frame that would give the option of running a several shallow chisel diggers ahead of the harrow in kind of a pasture renovator type tool... Or a thatch rake type implement behind the harrow..
Your only limit is your imagination....
Good luck..