Is it wood, or plastic? I guess it doesn't matter since this technique will save it either way. If it isn't too long for a 12" inch pan you can heat water in it, and put your part in the pan. Once it absorbs enough heat then you can slowly bend out the warp.You can also use a broiler pan filled with hot water a little at a time from a pan heated on the stove top, or if you have a big enough stove top you can use two burners to heat the water in the broiler pan. If not I'd suggest using something made from aluminum, copper, or brass tubing to replace it, or support it depending on how bad the warp is, and what size diameter your part is.
DO NOT USE FLAME!!! Only use hot water to keep from destroying your part, and burning yourself. If you get the part too hot it can make it worse, or it can destroy it completely. You can also tape your parts to something sturdy after warming it so that it will take the shape of something straight. I hope this will help. Take pictures, and let us know what your results are.
~ Cobra Chris