Domino 6.5.1 with Portal 5.0.2 - download/software?

Using the “Domino and Extended Products” for 6.5.1 I’m trying to evaluate using the 6.5.1 portlets in Websphere Portal 5.0.2 however … in the Intergration Guide the link to download Portal 5.0.2 Multiplatform version doesn’t work … Does anyone know where and exactly what I need to download to install Websphere Portal 5.0.2 (Windows)?