theme switching (again)

i have seen various plugins for older versions of elgg that offer some type of theme switching function and i can see this archived plugin from coldtrick: https://github.com/ColdTrick/customstyle

so far though i am not seeing any 1.8 compatible plugin that can allow users to choose a theme (or just a different css file while keeping the other view files the same)..

does anyone know of such a plugin?

thanks