Sure, here you go

https://www.amazon.com/TYC-800021P-Subaru-Replacement-Filter/dp/B000VKTUNM/ref=au_as_r?_encoding=UTF8&Make=Subaru%7C13&Model=Crosstrek%7C25151&Year=2018%7C2018&ie=UTF8&n=15684181&s=automotive&vehicleId=1&vehicleType=automotive

This isn't as critical as oil, or the oil filter, so you can go off brand imho.