If I am reading your profile correctly .. a TP-Link TL-WDN4800 will do nicely.
http://www.amazon.com/dp/B007GMPZ0A/ref=as_li_ss_tl?ie=UTF8&tag=tonymacx86com-20
Otherwise let me suggest a rather easier and often pretty cheap solution that is bullet proof.
Get a bridge router and use that. What you buy depends on the main router. eg if you have an apple AE or TC as main router then any Apple router in wireless extend mode will provide ethernet to wireless bridge.
A second hand AE can be cheaper than a dedicated decent wireless card and you can locate it better on a few meters of ethernet cable.
If you have a different brand you cannot use the AE or TC but you can use the Express. Or use a similar router that has universal bridge or WDS. This is not 100% straight forward.. what you have now dictates what you will install.