You could easily make your own CB that has a narrower chord so it does not stick up out of the deck.
Get a nice piece of hardwood, the same length as your current CB and simply use cardboard templates to make another CB out of wood (marine plywood, with a layer of fiberglass and epoxy resin would work as well) but move the trailing edge forward enough so that it does not protrude through the deck.
I cut back a bunch of the early Start CBs to prevent them from sticking up through the deck and I just reshaped the foil to the new trailing edge.
They worked every bit as well as the originals.
Hope this helps,