I found a company called BBA-reman who will refurbish your bsi unit for £125
http://www.bba-reman.com/content.aspx?content=peugeot_bsi_body_control_failure
because they refurb YOUR unit, there is no need to reprogram it to your car fitting is simple and guides can be found here
http://deruiter.jp/index.php?page=PeugeotBSI&sub=Projects
hope this helps as i have the same problem and i know how you feel
mattyboy
December 2009