Specifically for the three specified suppliers in the description
Here is ERC
https://prnt.sc/udb3zj - it will search by external ID or vendor code
Here is DC-Link
https://prnt.sc/udb4ir - here only on condition that there will be a search by article
Here is Brain -
https://prnt.sc/udb4w3 - it will search by external ID or vendor code
But I would recommend using the article, each (out of 3) has such a setting. Therefore, knowingly load the article of the supplier and you will be happy, the goods will be updated, the article of these suppliers is the same.