I've been asked a few times to release the 'original' Usagi hair in a derivable form, so here it is, complete with maps. See the developers note below for a link to the maps.

The hair is knee length and bends with your avitar. Modeled off the famous heroine of the same name ^_~

Developers Note:

To assist in the derivation of my products, I compile a zip archive containing original texture maps as well as any other useful materials that will make derivation easier.
You can download the pack for this product here:
http://rns-sailorsoldiers.com/pub/imvu/dtools/usagi.maps.zip