Not sure if this has changed kev. I caught it in the 'featured item' last night (19:00 Mountain Daylight Time). I tried to buy it, but you get an error stating no items in the cart. It did not show up in the wardrobe catalog itself.
I always love seeing the art you have in the wing for us, but if my data organization serves, it's linked to in the Featured Items randomizer but not in the Wardrobe. Should just need to take it out of that list and it will stop popping up until you are ready to fully deploy the object.
1. refresh the wardrobe page until you get agrippina mask as a featured item. add it to your cart.
2. add any other item (preferably free) to your cart. if you try to buy agrippina mask alone, you get a "no_items" error message.
3. click save & checkout and confirm the purchase. it says agrippina mask costs 40 credits but it doesn't actually cost anything. after purchase, stay on the wardrobe page.
4. enter alpha.glitch.com/wardrobe/#!hat.389 in the address bar and hit enter. it should pop up the info page for agrippina mask and highlight it in the featured item box. hit recycle (in the featured item box) and get your free 8 credits. repeat the process if you want more.