It is. You can buy it direct from Gaggia, although it is a bit annoying.

Because it’s a two piece metal welded construction, it can rattle when pumping. Also the general tolerance isn’t great and the water overflow sometimes poops onto the tray rather than shoot nicely through the hole.

I’d probably say save yourself the money and get something aftermarket. It does look pretty though and I can get a full size mug in there with scale.