That 7557 serial number is fairly recent. Mine is 8225, and I ordered it new from Hensley about 8 months ago. The one in Wisconsin is #1585, and unless the the hitch bar is the right drop, you're looking another $200 + shipping for a hitch bar. I don't know if Hensley will do the exchange thing for other than original owners.
SuEllyn & Brian McCabe
WBCCI #3628 -- AIR #14872 -- TAC #FL-7
2015 FC 25' FB (Lucy) with HAHA
2005 Suburban 2500 Quadrasteer (Olivia) & 2011 Silverado 3500 (Fred) with Outfitter Truck Camper (Ethel)