I want to upgrade my chart plotter for the original Simrad NSS8 to a B&G Zeus 3s. Unfortunately the 9” plotter is too small (in height) for the hole, and a 12” is too big to fit on the binnacle of an Oceanis 37 (and is much more expensive). Is there anyway to fill the hole that doesn’t look crap and is suitably waterproof? Or can i replace the front plastic part of the instrument binnacle and cut new holes? If so where would you buy the part?