Zip Code company

Zip code program... Just a couple of hundred dollars.

http://www.zip-codes-latitude-longitude.com/Products/?Family=DistRad

Another company...

http://www.zipwise.com/database-more-info.php

Congressional Disctricts zip code look up...expensive.

http://www.zipinfo.com/products/cdz/cdzop.htm

Congressional Disctricts zip code look up...no price listed

http://www.electiondataservices.com/content/zipdistrict.htm

More zip code information...

http://www.caliper.com/DataCDs/LatestZIPCodes.htm

Political Maptitude

http://www.caliper.com/Political/PoliticalPricing.htm

yet more stuff...15K for store locator

http://www.zipfind.net/LocatorWeb.aspx