The mouse droid came with the Stormtrooper 2-pack. And the blaster rack was the exclusive--finally grabbed that last month from a board member here.
Not sure about Vader's cape, might have just got lucky or maybe since it's not under direct light they don't show up as much.
Extra bases came from buying extra figures and parting them out in some cases (with the OT heroes you get 5 of the gray ones
already), and then just buying from toy anxiety for the rest.
I was contemplating picking up more for if I some day have a second detolf, as it would be cool to extend those same floors across the two shelves but not sure as it gets kinda stupid expensive, would be smarter if I learned how to make custom ones.