Danny Bell (562-577-3673) has long narrow tapered collars that are drilled with a series of tiny holes in a way that deliver water to the strut bushing so they mount close up to the strut barrell. It's really an ingenious design, and are not as blunt as the one pictured in the RexMar pic (sorry!!) and not likely to divert water from the prop. Heath Hiebert uses one on GN369 and it works great. I think Jim Wilkes sells them too.