How to make Bank Account read only for Supplier Inquiry

We have made an AP data entry responsibility to have inquiry only access to Suppliers by removing the function "Supplier Full Access : Buyer View".  Everything is fine except for the supplier banks.  The Update Account button is still highlighted and the responsibility has access to update the bank account.  I have tried various functions but have not found the right one that can make the bank account information view only.  Any suggestions - has anyone else noticed this?

Thanks,

Susan