Tracking WholeFoods Pre-Prepared foods

Hi,

In the UK how can you track the foods that Wholefoods pre-prepare themselves? The majority of bar codes when scanned are not found and not sure how to track these. For example pre-prepared meats, fish and fruits such as: watermelon, Zucchini, pumpkin, sweet potatoes etc. Is there a way to find these foods in my fitness pal or is there a way to add them?

Love wholefoods, but not being able to track a lot of their foods, due to lack of barcode data is frustrating.

Cheers
Mike