I'm looking at either getting a Igloo 60qt Cube or a rectangular cooler and I'm wanting to use it as a MLT,my question is has anyone made a stainless steel false bottom for a "Cube Cooler" or a rectangular cooler?
With a large base, it's very likely that a false bottom would move around and let grain get through. Use a manifold if you want to fly sparge or a braid if you want to batch sparge.
Double-R is right. The easiest thing to use is a SS braided toilet drain line. Cut the ends off, pull out the rubber hose in the middle, and use a hose clamp to seal it off.