Create invoice from a product with the REST API

Hello,

Is there a way to create an invoice from a product item or product code using the REST API without using the Subscription endpoint? We need to create a one-off invoice that is not a subscription fee. Our REST call is made from an external system service and triggered programmatically so it cannot involve any user interaction.

I have followed the ASI Documentation at Adding, modifying and paying for a subscription to create an invoice from an Item Code. This works but it creates a subscription invoice which is not a fit for our scenario.

Is there a way to accomplish this same functionality but for creating different types of invoices?

Thanks.