Actually that is not strictly true....On occasion we do what we purport to be...'Custom' installers, and have fabricated our own product when there is a need. This however typically means that we take a group of already developed product, fabricate a housing/front-plate, integrate the products that provide the required solution, and make it work within the parameters required for the project.

Seems you want everyone else to suggest a solution so that you can shoot it down.

Rather than whinge that your specific requirements aren't available off the shelf, get your custom hat on and sort a custom solution.