WordPress / S2member payment gateway integration

This project is to provide a SagePay Direct payment gateway for the S2member Pro WordPress plugin. As well as providing a fully working and integrated solution using the Direct method (including US payments where the state needs to be specified, 3D secure and SagePay / PayPal account integration) we will need clear instructions to be able to take the gateway code and install it into other S2member installations. We have a website with the latest versions of WordPress and S2member Pro installed that can be used if required for development and testing and we will need to see a working solution in this site before any final milestone payment is made. Please bid only for the above payment gateway but also send a PM with the costs of also doing two further payment gateways at the same time - SagePay Form (this should be very easy after doing the Direct gateway) and Nochex. We may choose to do 1, 2 or all 3 gateways depending on the price and delivery timescales and would setup additional payment milestones where required. We can provide full documentation for all three gateways and also access to test accounts.