A 40W CO2 laser will not cut metals, period.

Save yourself the wait and spend $395 on eBay to get a much more sturdy version shipped to your door. It's not perfect but at that price, imperfection is forgivable.

OK. We have a laser cutter at work that will cut very thin metal stock but I don't know what its power is or anything else about it.

Many techshops have a water jet cutter.