Hy Capacity is located in the Humboldt, IA area. They have several items that they make for tractors and combines. look them up in Yellowpages.com, it gives the address and phone n. Good luck!
I live about 17 miles south of Humboldt and the phone book lists Hy-Capacity Engineering 908 1st Ave SW Dayton, Iowa 50530 515-547-2812 515-547-2816 515-547-2827 515-547-2828 and it also lists Hy-Capacity Engineering and Manufacturing 1404 13th St SW Humboldt, Iowa 50548 515-332-2125