How would I go about getting an IPublishedContent node without hard coding the id of the page?

I am making an AJAX call to update a partial view and lose Umbraco context, therefore I cannot use something like AssignedContentItem.

Basically I have the below:

IPublishedContent node = this.UmbracoContext.ContentCache.GetById(CurrentPage.Id);

        var currentUser = Umbraco.MembershipHelper.GetCurrentMember();
        var currentUserWelcome = node.GetProperty("profileWelcome") + currentUser.Name + "!";


        var model = new Profile
        {
            WelcomeTitle = currentUserWelcome
        };

        return PartialView(LAYOUT_DIRECTORY + "_YourProfile.cshtml");

I want to dynamically get the corresponding page so that if it were to move in the back office or the id were to change it would not break.

Thanks