Placed an order with RockAuto for a belt-tensioner w/pulley, idler pulley and a new serpentine belt all made by Gates for my 2001 Sport Wrangler. Now I'm reading there may be a problem with the idler pulley fitting correctly because of redesign? My bad...should have done more research before buying. If I'm forced to buy one from O'Reilly's which brand would be a direct replacement if they don't carry Mopar?