Mutli Currency Invoice generation from a contract

We have a requirement to create a contract in foreign currency (other than ledger currency).

And use the same contract to generate sales invoices in all foreign currency. I tried enabling Multicurrency billing at the Business Unit level and then on the Contract bill plan selecting Billing currency type as User and Invoice- revenue currency as the foreign currency we want to use for a particular line. But still while creating a manual billing event (Amount-based Invoicing method is used) for that contract & Line combination Billing transaction currency comes as Ledger currency only.

Do we have any option to create a manual billing event directly in the required foreign currency?