Well it came today and it looks like the OEM 1484961 part number is correct, I'd say that's more of a Product Location difference (EU/AU) kinda deal. Its got me thinking with the old one I might clear out the old rubber and fill with my own to make a spare or sell. I know of a similar Sikaflex product that matches the media quite nicely.
anywho...here's a pic if anyone is interested:
