The ornamental design for a spineboardbodyretainer, as shown and described.
FIG. 1 is an isometric view of a spine board body retainer showing the top,
one end and one of the two like sides of the design;
FIG. 2 is a top view of the design;
FIG. 3 is an end view of the design;
FIG. 4 is bottom view of one end of the design; and,
FIG. 5 is a top view of an alternate embodiment of the spine board body
retainer showing the it in the colors black, red, green, yellow and blue.
All other sides are identical to that shown in FIGS. 1-5.