Understanding Society User Support

I am looking for information that will allow me to identify the individual parliamentary constituencies that respondents lived in during the period 1991-1996. The default parliamentary constituency file currently available contains data for the constituencies that took effect with the 1997 General Election. As a result, it "imposes" the post-1997 situation on the 1991-1996 period. If possible, I would like to be able to identify the old constituencies that were in place prior to 1997.
Many thanks for your help.