Can Service Dashboards that exist be copied to a new one?
There is a way, but its overly complicated. It has to be scripted. And it would create a new one. Broadcom support cannot create this script for you, however services could be engaged to have this done.
Another way would potentially be Modeling Gateway - you would export the services, then you would have to hack up the XML file and then reimport.
But there is no way to "copy" one to create a new one.
Support advises the easiest and cleanest solution is to create a new one from scratch.