You should be able to request eval licenses without your User Center account being attached to your company.
Go to Learn > Evaluate > Product Evaluation in User Center and request the appropriate licenses.
You're on the right track in terms of the licenses you need.
MLMs are a subset of MDM functionality, and thus you'd use the same eval licenses as MDM (e.g. CPSM-MD1004-EVAL, CPSM-DMNU000-EVAL-F).
If you're upgrading to R80+, there is no such thing as SmartReporter anymore.
SmartEvent has replaced it, and that will require a separate (non-MDM) server.
The license for that should be covered by an "All-in-One" eval.