The ornamental design for a retrofit toiletpaperrollholder, as shown and described.
FIG. 1 is a perspective view for a retrofit toilet paper roll holder showing my new design;
FIG. 2. Is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof,
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a perspective view showing the retrofit toilet paper roll holder in an environment in which it may be used.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.