We need to log calls to Vendors that are related to Contacts

We need to log calls to Vendors that are related to Contacts

We often call our vendors to discuss our contacts with them. When logging a call, we can't choose that the call was to a vendor and related to a contact. We can only do it the other way around, which is inaccurate. 

Could we be given the option to log a call TO a vendor and state that it's RELATED to a contact? The screenshot below shows what we'd be looking to do. Thanks!