I claim the ornamental design for an in-wall toilet paper storage cabinet with spring-balanced shelf and horizontal roll-up doors, as shown and described.
FIG. 1 is a perspective view of a in-wall toilet paper storage cabinet with spring-balanced shelf and horizontal roll-up doors showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof, the right side elevational view being a mirror image thereof; and,
FIG. 5 is a top plan view thereof, the bottom plan view being identical thereto.