Reseller module for a2billing

Hi, I'm looking for someone who can provide me with a reseller module for asterisk2billing. It would be nice if you could provide me with some demo if u've already got one. For the payment, I'll pay 80% upon delivery of project and 20% once I managed to install it and confirm that it works fine, which prob take about 1 or 2 days. If you're interested, please contact me. Thank u very much.