I know this seems trivial, but does anyone know of a 'mascara' type item as good as this please? I've looked at, and bought a lot of different types, but I love this one.

hope that works I've not done it before :0) I have real trouble accepting that I just cant have something I want lol.
You could try layering with . Not the same smudgey effect, but it's similar.
You can also try layering eyes like with any other eye item and layer that for an effect like that.
(Psst, you can show item previews by typing in the code; [*item=item name here] without the asterisk!)