You may be able to right-click in the space of the Contour Profiler graph. Choose Edit -> Copy Frame Contents. Then in the Graph Builder you can right-click in the space of the Graph Builder graph. Choose Edit -> Paste Frame Contents.
This will also bring the crosshairs into the Graph Builder. You can remove the crosshairs in Contour Profiler by right-clicking again in the space of the Contour Profiler graph. Choose Customize, then one of the options is for the Custom graph. You can change the Line Width from 1 to 0 and it will not appear.