Answer Base

I have a wired router with 4 ports and i want to know if there is a device for sale anywhere that i could plug into 1 of the ports to make it wireless without me actually having to buy a whole wireless router?

You need a wireless switch cuz you have already a server,that is your router.check a wireless router from 3comhttp://www.3com.com/products/en_us/detail.jsp?pathtype=purchase&tab=features&sku=3crwx120695aand another from dlinkhttp://www.dlink.com/products/?pid=434&sec=0you are better,in my view,to buy a wireless router. wireless switches are very exprensive,they cost around thounsands of dollars.