I know this is a long shot, but I thought I'd try.
I've got friends on a roadtrip from Washington, who are in Austin right now with a 1997 EJ25, that does fine on the highway and then tries to overheat in normal traffic. They have no tools or mechanical knowledge to speak of, and my impression is that they do not have a lot of money. They have described a visible coolant leak, but haven't sourced it.
If anyone is around that feels like helping, they could really use an actual diagnosis from someone who won't be trying to scam them into a headgasket job if they have a bad hose.