Need to access custom OAF page outside EBS domain from a third party Application as a Punch-In Page

EBS Enthusiasts,

There is a requirement to access a custom OAF page outside the EBS domain ( i.e., via a SharePoint application as a punch-out page). The custom OAF page has links to launch a WebADI. The idea is to allow users access to this custom OAF page and the custom WebADI integrator. I know there is a feature for running a JSP page from JDEV that can run the page in a standalone mode, but will it work for redirections that trigger WebADI? Any pointer with any sample implementation code is greatly appreciated.

Note: This is not about the iProcurement punch-out feature, where EBS invokes a third-party application page and returns back info to the cart. It's the other way around/ vice-versa, i.e., a third-party system wants to invoke the EBS page from their portal screen.