How to Replace Xml Data Islands in Critical Classic ASP Application

I need to replace the Xml Data Islands in a Classic ASP application because our client has mandated that the application must support Chrome and Firefox. The main problem is how to replace the functionality of the XML Data Islands. They use data binding and support updates to the data. We will be upgrading the application to ASP.NET but the client is not willing to wait that long to have the application available to Chrome and Firefox.