Assign bank account to supplier from employee

Summary:

We have some Suppliers that are existing employees who need to be setup through Manage Suppliers under Procurement. When we go to setup their bank accounts, the system throws an error saying the bank account already exists. This makes sense because they have their bank account setup on the Payroll side. Is there is a way to assign their bank account from the employee/payroll side in the Manage Supplier Page? I tried using the Add Existing Bank Account, but nothing shows. We are only setting the bank account at the profile level.

There does not seem to be a way to link Suppliers to employees. Any information or suggestions anyone could provide would be helpful.