The ornamental design for a dual surfboardfin or the like, substantially as shown and described.
FIG. 1 is a front end elevational view of a dual surfboard fin or the like
showing my new design, with the fin being shown upside down from the
normal position of use;
FIG. 2 is a top plan view thereof;
FIG. 3 is a rear end elevational view thereof;
FIG. 4 is a bottom plan view thereof; and
FIG. 5 is a side elevational view thereof with the opposite side being a
mirror image.