Check out centerlines...
Tough to beat a light, (18" x 8" = 22 lb) strong, forged wheel, they're not the cheapest wheels out there, but they do have some models on "overstock pricing" as of late.
Dig around the site, & if you search by vehicle, input "Toyota truck/suv - 6 lug" as your criteria, since they don't have Isuzu as a choice.