I think that you will find interesting the following article:

Human hepatic stellate cell lines, LX-1 and LX-2: new tools for analysis of hepatic fibrosis

L Xu, A Y Hui, E Albanis, M J Arthur, S M O’Byrne, WS Blaner, P Mukherjee, S L Friedman, F J Eng

Gut 2005;54:142–151. doi: 10.1136/gut.2004.042127

You can use primary stellate cells, but take care with their activation, which is concomitant to the isolation procedure. Perhaps papers from S. Choi can help you.

They are an excellent model for study the efficacy of new anti-fibrosing agents and to know better the fibrogenesis process