Same product with different EAN

Hi David. I am using uidmap, which is great! However, I am trying to figure out how to map products which have several EAN. Each merchant use a different code, so mapping is not "perfect" and products are not grouped.

For instance, I have a product called "Polar M600". This product can have all these EAN-Codes: 0725882014258, 0725882014289, 0725882034133, 0725882034140, 0725882034171, ...

How do you think I can solve this? Maybe create a new content management page for manually writing these EAN?

Thanks...