The ornamental design for a retrofittableswitchguard, as shown and described herein.
FIG. 1 is a perspective view of a retrofittable switch guard in accordance with the present invention, with the retrofittable switch guard shown positioned about a rocker switch;
FIG. 2 is a perspective view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a back elevational view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a bottom view thereof.
The broken lines in the drawing views are included for the purpose of illustrating portions of the retrofittable switch guard that form no part of the claimed design.