Question about the Sewer Rat

I'd like to make a full ghillie'd up set, since as I discovered this month, I really like the Mantis, and I saw that the Sewer Rat exists. Problem is, from what I'm seeing, the only way to earn it was from last month's event, which I missed since I was not active.

My question is: will/do the event completion rewards cycle back in some form (i.e. purchasable on the store/earnable in other ways), or is it gone forever? And if I can't earn it again, are there any news on other ghillie suits or cosmetics that look like it coming?