I had read on Jason & Gail’s very helpful Two Fish blog about a wall plate they had built and installed at their Nav Station. They mentioned on the blog that they got it at Ram Electronics. It turned out not to be as easy to find the site, or the product (it gets specially made) so I thought I’d share the information here. It should work well in any boat, and you could contact the factory and customize it further to your needs.
The manufacturer is:
You can order by emailing Stephanie at Steph [at] ramelectronics [dot] net.
Price $ 123.15 each