Upgrade route to Enterprise

Our renewal is due in less than a month and we'd like to upgrade to Enterprise Edition.

Given the cost, our company processes specify that we should avoid using credit cards (which are tied to people).

Would you be able to invoice us and for us to pay by bank transfer so that we can move away from credit card payments? 

If so, we're happy to start this process now and have the money paid prior to the renewal date.