Our business is supplying repair parts for your needs. Replacing electric panels can be costly, but with us we offer a stock of Zinsco, Sylvania and Challenger panels and other parts to get the job done at a lower cost. . We are a newly formed company, so our inventory is growing daily. We sell and ship parts nationally but also service our local area in Southern California. Circuit breakers for Zinsco Boxes are easy to find, but the doors, hinges, and dead fronts are quite difficult (and costly) to find.