I just bought a lid for a 5 gallon bucket that had an aerator in the package and the whole price was about $15. I don't know how it will last since I only have about 20 hours on it up to this point. It does some to be quiter than the 3 frabils I own. Here are some options including one for about $6. The dual power unit is not but about $15 as well.

http://www.academy.com/shop/browse/_...atchallpartial

Hate your unit quit and hope you find a satisfactory solution.