Some websites to browse:
http://www.acrobatico.com/
http://www.aims.aero/index_new.htm
http://www.navitaire.com/op_and_rec/geneva.asp
http://www.sabreairlinesolutions.com...ate/rocade.htm
Of the systems listed above Acrobatico is likely to be the cheapest, however, I suspect on a cost basis you may be such with the excel spreadsheet.
Good luck