www.newegg.com
An Enermax 140mm one, $10 but also FAR.
These FAR deals, with FS, don't last long.
Edit: First one in OP is "Backordered", I wouldn't order it. I assume that these are new-old-stock, that they are trying to get rid of. Most of the reviews were from like 2014-2015. Must have been sitting in the warehouse for a while now.