If you're willing to try this yourself, you can make a simple frame jig to straighten the stay back. The easiest thing to try is to get some 2 x 2 hardwood stock about 12 - 18 inches long. Get 4 coated metal screw-in hooks 1 inch diam which will fit around the stays. Drill a hole through the middle for a long 1/2 inch diam bolt with nut and washer on the end. Pre-drill and screw in 2 hooks on each end on the same side as the nut/washer. Now hook the stay and center bolt on the point you're trying to push in to straighten the stay. Pad it with strip of thinner falt wood or metal taped to the stay to protect the paint. Now slowly screw down the bolt while the hooks pull from either side. Moving that center back just a 1/2 inch or even less will probably do it.