9 in diameter wheels?

get you some factory banshee, warrior, raptor or yfz rear rims, with the rolled lip, < toughest there is, from ebay,
but you'll need the 4x115 hubs also

or look elsewhere for 8" tires that fit your rims, or are you really needing a specific tire that only comes in 9's ???
 
rockymountain has all the wheels in all sizes you will need. they do not list them specifically on the website. if you call them they will have them, great prices too.