Best way to get these members of the Batfamily as minifigures?

I really want to get a LEGO Nightwing, Red Hood, Batgirl, and Tim Drake Robin to round out my batfamily. Batgirl has had a recent release so she should be easy enough to get, however getting the official Nightwing and Red Hood ones secondhand are pretty expensive, so any decent customs of them (and Tim) that you guys recommend or have seen?