The real question you must ask yourself is "Would I rather repair one aileron, or rekit the plane?"

First, make sure its really a warped aileron and not a warped wing. Sight down the trailing edge of the aileron. Is there a visible curve to the trailing edge? If so, the aileron is warped. If not, then you may have introduced a warp into the wing while covering.

You can try working the warp out of the aileron by removing the covering, soaking the aileron with water, and then clamping it to a work bench to hold it straight. When it dries (after a couple days) check it again. If you can find aileron stock at your LHS, its not that hard to cut and sand a new aileron. You may have to relocate hinge points, depending on what you have to do to remove the old aileron.

If its a wing warp introduced during covering, you can try shrinking the covering on one side or the other with a heat gun to try to remove the warp. If that doesn't work, you can remove the covering and try again with new material.

I highly recommend you find someone with more experience to help you evaluate the problem, and work out a solution.

Good luck.

Brad