The most detailed data that UN Comtrade offers is the combination of: reporter, partner, commodity (up to 6 digits), year and trade flow. If you need to find more detailed information such as port of entry/exit or traders, you should contact Customs Department directly.

Now, it is possible to download data availability (containing original publised date and revision date) in XML format. See Data Availability by date of loading http://comtrade.un.org/db/mr/daYearsNewResults.aspx?nom=-1&px=ori