Just an idea, Google Bison and find one of their distributors and from that find a local dealer. The rear blades that I have looked at at the farm shows seem to be very good blades.
I have thought about getting one of their single shank subsoilers also. One of the draw backs of the Bison products is because of shipping, it can take awhile to get the implement if the dealer or distributor doesn't have what you want.
