I was doing shopping the other day and came across this thing, bookmarked it as it looks promising. Give it a try
http://www.ebay.com/itm/New-RS232-TTL-UART-Ethernet-TCP-IP-Converter-Module-/260947902733?_trksid=m7&_trkparms=algo%3DLVI%26itu%3DUCI%26otn%3D3%26po%3DLVI%26ps%3D63%26clkid%3D7164784537693166654#ht_3240wt_1037