I'd say it isn't worth the effort to do this. The resizable board code is part of core and while we might be able to fool it in to accepting a different image, the addition of only the tabs on the end (which would need to be resizable too which won't be easy or perhaps even possible without a code change) doesn't buy us much. I have a bunch of these boards in the various sizes and just use the current perf board adjusted to the row and column count. Breadboard view (unlike pcb which has been suggested as the better place for this) doesn't really support top and bottom layers so the dual layers aren't that useful (in real life the plated through holes are invaluable, but in Fritzing not so much).
Peter