hydraulic tensioner-where to get parts? no Isuzu dealer in my area how much is part a

There is no Isuzu dealer in my area where else can I get the tensioner?i replaced the belt,tensioner pulley,idler and water pump.Can the Honda dealership help me?

Most decent auto parts stores will have all of that stuff. Dealerships charge too much.

I got my tensioner at a locally owned parts house. Cost about $70. Napa should have it.