I ran across these. They look like they would be simple, probably need a little more robust attachment on a Cat, a Zip Tie to lock on or something. The other caveat, the description reads, "water resistant". Some marine silicone might keep them alive.
http://www.ebay.ca/itm/Cl…Gear&hash=item35b8ef7265
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Nacra 5.7
Nacra 5.0 Shhh Wife doesn't know it's here
Bombardier Invitation (renamed SS Minnow by kids after an unfortunate incident)
Various other Dock cluttering WaterCrap
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