I like j2 in particular, for giving you the chance to use two arguments as a filter to pin down a particular directory.
It looks like neither of these has been updated in a while, but they still work fine. I should mention that j2 apparently relies on some python. Old, old machines might suffer with that.
Straight j, on the other hand, is just a shell script, so that might work better for you, or prove more portable. Either one is worth a look.