The information requested is not available at parliamentary constituency level due to small survey sample sizes at this level of geography. In addition, the information available is based on 2006-07 survey data which would not be reliable for this purpose.
Available information on incomes by parliamentary constituency based on the latest available Survey of Personal Incomes (2006-07) can be found in Table 3.15 “Income and tax by Parliamentary Constituency” available at:
http://www.hmrc.gov.uk/stats/income_distribution/menu.htm