It takes the same cabin filter as a JK. The inventor created the modular version first and the files are free. He has since upgraded to a single piece version which he sells for $40 on eBay. I'm a cheap mofo so, I'll print the free version. But for those that want to buy the single piece the link is below. He also has a water shield for it, but he says it's not really necessary.
https://www.ebay.com/itm/1159138737...pid=5337789113&customid=&toolid=10001&mkevt=1
https://www.ebay.com/itm/1159898397...pid=5337789113&customid=&toolid=10001&mkevt=1
My luck with printing stuff hasn't been great. I can't print it myself so I send it to the local library for pennies per minute. But I can't ask for specific type and everything I have had them do has eventually warped. I'll pay the $49