Doesn't Harbor Freight sell parts for most of the things they sell? If it is truely just a rectifier (4 diode bridge), then I would think you can use any rectifier that has sufficient PIV and amp rating. The online electronic parts stores have lots of choices.
If there is other stuff in this rectifier, then you'll need to use the factory part or redesign the thing with discrete components.
Last edited by suemarkp : July 17th, 2012 at 02:04 PM.