The current machined Boxy Pixel Game Boy Advance shells are able to fit both the AGS-101 and the IPS screens. Since the AGS screen is larger, this custom 3D printed piece is a simple spacer adapter that will fill the extra space to locate the smaller physical size of the IPS screen.
Color may deviate from what is shown.
3d printed parts can have large size tolerances. Always check fit before final installation as some out of tolerance parts may require minor trimming for a perfect fit.