I got bored waiting for KB976002 to show up in my WSUS install so after a little googling I discovered you can manually sync it in to WSUS.
On the front page of the WSUS console under resources there’s a link to “Microsoft Update Catalog”. If you click through that you’ll be asked to install an ActivX control at which point you can search Microsoft Update for KB976002 and manually sync it on to your WSUS install.
Once it’s synced over, you can then manually approve or decline it as you wish.
Apparently it won’t be showing in WSUS automatically until April.