I have a custom made boat cover for a CV16 I/O, however I installed on a CVX-16 O/B without motor and it fits like a glove.  So I think it would work fine on a CVX-16SS too.   There is one small scuff as shown  in the picture, otherwise it has been used very little.  The material is MasterDuck,  a 9.5 oz 65% Poly, 35% Cotton marine duck canvas. It is Water Repellent, breathable, mold & mildew resistant, and contains UV inhibitors. MasterDuck fabric is recommended for mooring and storing.  $150/bo and can ship.