Any router that supports"Wireless Bridge"
mode. Or any access point that can be configured as a Wireless bridge. Several routers are supported by aftermarket firmware that allow you to use Bridge mode. Flashing a router is not for the novice user and you have to follow the steps very closely. You will want the bridge to be the same wireless type of your router. If you connect a 802.11G bridge to a 802.11N router the wireless speed will drop to 802.11G. you might want to consider Power line Networking.
Edit: Removed large picture, Added link instead
Edited by Sneakycyber, 08 September 2012 - 03:10 PM.