The ornamental design for a surfaceconfiguration of a front spoiler for a vehicle, as shown and described.
FIG. 1 is a left perspective view of a first embodiment of a surface configuration of a front spoiler for a vehicle according to my novel design; and
FIG. 2 is a left side view thereof.
FIG. 3 is a right perspective view of a second embodiment of the surface configuration of a front spoiler for a vehicle according to my novel design; and,
FIG. 4 is a right side view of FIG. 3.
The broken lines are for illustrative purposes only and form no part of the claimed design.