There's no way to do it unless you can code, because I thought it was simple to do since there's code you can use from the support manager but I'm a bit stuck.
@Paul, @Cody and @Tyson might do one for us if there's a high demand, because they want it to be the best Billing system, which is now, but some of us like yourself, dave and myself really need / want one lol. It would cost them over $3,000 to do one.
However if we was to pay for ModulesGarden (Rip off Polish developers) would cost $600 - $900.