The ornamental design for a side cover for a vehicle bed liner, as shown and described.
FIG. 1 is a perspective view of the side cover for vehicle bed liner, showing the new design, in position on an example bed liner; and,
FIG. 2 is a front view of the side cover for a vehicle bed liner, thereof.
The vehicle bed liner, shown by broken lines in the figures, is illustrated to show the nature and environmental use of the design and is not part of the claimed design.
A back surface of the cover, which is not illustrated in the figures, and which would be opposite the front surface shown in FIGS. 1 and 2, is hereby disclaimed as not forming part of the claimed design.