well, i live north of the border, so that's probably not much help.
my stepper came with factory 3:73's, my k5 i bought Yukon ring & pinions from Lordco (our version of autozone, o'reilly's, whatever)
http://www.yukongear.com/ProductDeta...px?ProdID=5309
http://www.yukongear.com/ProductDetails.aspx?ProdID=541
there one of the pricier ones out there, but NEVER had a fail. Motive gear, & Richmond have better prices on theirs.
could prob. pick up a set off ebay or something for $2-$300