Credit Card Processing Fees - Generate Invoice

Credit Card processing fees present a challenge in recording the transaction in Netsuite. There's not a way to add to the payment receipt in netsuite and code that credit card processing fee properly to the G/L. Would be awesome if you could have a setting to map an item code to that transaction so when a customer paid via credit card an additional invoice was automatically created in Invoiced for that fee and pushed over to netsuite. Then both payment transactions map to invoices. I'm having a hard time accounting for payments that don't equal invoice amounts and keeping accounting system and invoiced in sync.