Are there affiliate networks that provide product feeds with UPC/barcode data? I've checked CJ, but they don't seem to have barcodes in their feeds. And Google doesn't even seem to have feeds.
I think I did see one or two networks with it. Have u checked out Linkshare, ShareASale or the UK affiliate networks. When I saw one or two networks, it was about 3 yrs back when I was using networks product feeds. Don't use them anymore though. Not sure if this will help, but here is a list of networks/programs that have datafeeds with reviews.