Is there anything that non US peeps can do?
Unfortunately no. This is a legislative issue right now, and elected officials will only pay attention to messages from their constituents. They won't even pay attention to Americans living outside of their districts, so those overseas will not have any impact on them, I'm afraid.
A companion legal action has been filed in the courts to put a restraining order on the copyright groups from imposing the new royalty rate structure, as there is a concern the Senate will not take up the legislation before the 15th, so various bases are being covered as much as possible. But we still need Americans to get on their phones.