It’s almost too easy. You can be the bee who goes out looking for the flowers, or you can be the flower and have the bees come to you. When you ask directly and clearly for exactly what you want, what you want will come to you.
Ask one person directly, or ask the many. When it's sincere, has a good reason and there is trust, you'll eventually get it.
So keep investing in relationship building and publicly producing. It builds goodwill for the occasional ask.