Moving Axle + Bolt in Notch = ?

[BigCountryx]

Is there any "bolt in" c-notches that would allow me to move my rear axle about 1" rearward without getting out of the notch when aired out? I'm going to be bagging the rear and everyone says the axle looks too far forward with the stock trailing arms when completely aired out. Was planning to correct that, but with the curvature of the frame, I suspect that the notches cannot be moved any, in order to compensate for my plans. I'm sure this has been done, not trying to reinvent the wheel here. Also not looking forward to fabbing my own notch, but I will if necessary.