Answer
No separate Aurena-specific version is needed or planned — the Excel Add-in is fundamentally an add-in for Microsoft Excel itself, not for a specific IFS client, so the same add-in works regardless of whether Aurena or IEE is the primary client in use. It's downloaded from the application's Add-Ons page, normally reachable directly from the application's landing page; if that Add-Ons link isn't visible for some reason, appending /admin to the end of the landing page URL should reveal an admin-oriented Add-Ons page where it can be downloaded from instead.