The ALU has on barrel jack on the back I'm not sure if it's a 5.5x2.5 or 5.5x2.1 though.
The power adapter is one of those in-line ones, with a two prong non-grounded detachable power leads like you find on laptops.
It's a pretty standard power cable. You might have one lying around if you need it - check the printer, piano, TV, monitor, other power supplies, etc. Otherwise just order from Amazon or your local tech store...should be a standard in-stock item.