There are other companies that make a device simular to the Harley rake (basiclly simular principal as a rock rake). LandPride  http://www.landpride.com/main_products/main_pr.html 

and ATI - http://www.preseeder.com/preseeder/

I think JD's Fronteer brand machines may make one also.

As mentioned, simular principal as a rock rake (if one is in your area).

Most major cites in SD would have a rental store that would have one or Bobcat or Cat rental dealers should.

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