There is a new platform, Sci-Net by Alexandra Elbakyan where researchers can help each other by providing paywalled papers. The platform builds upon Sci-Hub meme token $scihub to reward active members.
A self-hostend STUN/TURN server maybe? I don't know but I'm def not installing a VPN for this. Considering I might have another one already running. The issues that would arise from this are numerous.