I need to create 2 layers of membership. Some of the users

I need to create 2 layers of membership. Some of the users pay by standing order in their bank and some what to pay via PayPal on the website. All members get access to the same content, there is no levels to the content. What I need to do is level that people can choose to join saying 'Standing order' with no link to a payment gateway. I have set up the PayPal levels and subscriptions ok, I just need help solving the problem of 'off site' payments. The admin will check the standing orders are set up, but the admin still wants to have Standing Order members within the 'All Members' section.