Replacing the bearings during the idler pulleys and tensioner pulley will save you a bit $$ and is environment friendly. Unfortunately, Toyota won't market alternative bearings; You will need to buy the pulley by having an installed bearing, or for your tensioner, you are pressured to purchase your complete assembly. https://gettydirectory.com/listings727877/not-known-factual-statements-about-debt-collection-service-in-anaheim