Boy, I hope you are strong as big UPS's are very heavy! Here's one:http://www.newegg.com/Product/Product.aspx?Item=N82E16842106116
Decent reviews. Also it should use the regular 3 prong plug. Watch out for some high capacity UPS's as some require a horizontal plug (and possibly an electrician to rewire part of your house) to accept the high amp requirement.