Best place for spraying sundries?

So...it's my first foray into airless spray next week. I've just bought a shiny new machine.

I hold you lot responsible for that ( and for the festool , and the mirka.....)

I was wondering if anyone has any thoughts on the best place to get sundries for masking, ie a decent tape, film or paper.
And is it worth getting a masking dispenser? Or is that one gadget too many?

Thanks