RockAuto.com is an online parts supplier of aftermarket parts. Gates is a well know belt/hose/water pump etc manufacturer that you can buy through RockAuto.

Your truck's a 97, not sure you can justify OEM prices that will be 3-4 times aftermarket. On RockAuto you'll get a choice of manufacturers.

Ten years ago I used mostly OEM parts for my timing belt/water pump service at a cost of about $650. This time around I used 98% aftermarket from RockAuto and the cost was just over $200.

Some of the aftermarket manufacturers produce for the OEMs.

92 Montero LS 3.0L V6 Auto, Stock, Original owner, 185,800K miles