Add AlertPay Payment Processor to vBulletin 4.x

We used to have an AlertPay module for vBulletin 3.x, however since upgrading to vBulletin 4.x this no longer works. We would like the module to work just like the paypal module. support standard payments & subscriptions, aswell as automatically move users if the subscription is set to do so. the module should work as if it was officially supported. logging and everything else the paypal, worldpay etc.. modules do in vbulletin. We must be able to easily add the module to our other vbulletin 4.x forums. Please Only Bid if you have previously worked with the AlertPay API & Have experience with Developing Plugins for vBulletin.