Unfortunately, it is time for a major overhaul of your car. Your Chevy has been quite under the weather, and the diagnosis is a leaky piston, or maybe two or three. It is quite the bad news to you, as this is as expensive repair with the combination of both parts and labor. To add insult to injury, the mechanic says it will take several weeks to special order your SBC pistons (small block Chevy). You require some forged, flat top pistons for your car ASAP, and are not sure what your other options are. You could look to some of the most reliable sellers on eBay for SBC parts, such as pistons and piston rings. Large inventories of automobile parts are available for Chevrolet, and virtually any other model of car imaginable. Find the parts you are looking for easily, without the hassle and without the waiting. The conditions of parts such as a piston range from new, to used, to rebuilt, with a variety of different shipping options available for your convenience.