If you are in search for a report on the characteristics of a wine, the best report is the Label Integrity Statement under Winery reports. If you ensure the Include composition breakdown checkbox is ticked you’ll get a unique breakdown by vintage, variety and region.
Otherwise you could run the Bulk Stock Report for that customer specifically and tick the Composition details check box, select Grouped origin from the drop-down. Change the format to CSV and check the Breakdown comp. (CSV) and then Generate get the report out in Excel. What this does is add a line entry for each unique composition entry for a wine. So for one wine you could have a stack of lines, each representing the composition element, but importantly giving you the % and respective volume as well.