Custom field with entry help from a standard field

Hello

We want to create a new custom field but with the entry help from a standard field, for example a WBS element.

You define the custom field with type "Assosiation to business object".

But only the followings Business Objects are available: Country value help, Language, Marketing product, Marketing product category and Profit center value help.

It is possible to define more Business objects for referencing in a custom field?

Regards.