[2019] Green Infernal Amumu

I was just curious if this skin is available anywhere anymore or if the codes during the promotional for the streamers was limited time. Back when these were being given out I wasn't much of an Amumu player as my typical jungler was Vi, but due to recent changes or maybe it was just the wild burr up my butt he has been a TON of fun to play. Any advice is appreciated. I don't mind the other chromas as I've already bought the skin, but want to know if it's possible before I buy a different chroma. Thanks!

Edit After some comments and a bit deeper research with this newfound knowledge, I found on their website it should be in the next few months. Here's the quote "We’ll be adding all League Partner Program chromas to the Blue Essence Emporium following the same timing rules as other chromas, for a cost of 10,000 BE per chroma."