Hi Jan,
You originally asked for a way to easily fin products in the SCM which categories as Sue mentioned would work great for this.
If you need an extension to show the SCM information inside the actually entry then Andy (ExpressionEngineer) made one of these once. Might be worth getting in touch with him to see if you can test out a copy of it.
As to something to show the information in the Edit entries tab you would be looking at an extension to do this. None exist that I know of unfortunately though.
Best wishes,
Mark