You should be able to find all these ingredients at Whole Foods. Trader Joe's may carry crystallized/candied ginger as well.
I used dried Black Mission figs here, but any variety will do. You can pretty much use almost any type of dried fruit as long as it is moist and meaty, like apricots or persimmons.
If you want, after rolling the truffles in chocolate, you can roll them in finely chopped pistachios or top with a pinch of flaky sea salt, orange zest or a thin strip of candied ginger