That power line gadget looks like it would work well. I have receptacles next to the router.

Ken, can you post a link to one of these wired to wireless adapters?

Rob,

No, I can not pull new cable. It was ran through log walls, up and down and all over the damn place. One of the joys of log homes is that no matter how much care you put into routing cables and plumbing, things move and you are bound to have problems somewhere. I do have two coax connections at the same J-box if there was some sort of coax Ethernet gadget?? All the coax lines are ran to the same spot as my LAN cables.