Ringke FUSION - https://www.amazon.com/Ringke-Minimalist-Transparent-Protection-Protective/dp/B075Q96XFH/ref=as_li_ss_tl?ie=UTF8&qid=1507187495&sr=8-5&keywords=google+pixel+2+Xl+bumper+cases&linkCode=sl1&linkId=45bcc54ef90107a098acf00aae6ce13b&tag=androidcentral00-20&ascsubtag=UUacUvbUpU6016385
Looks to be a 2-piece case. Don't know if you can leave the back off and just have the bumper
I really love the Ringke fusion case. That's a great choice.