We bought these years ago in bulk. Turns out there are 78 left! New 40mm fans on a 50mm base. https://www.elecshopper.com/fans-and-heatsinks/silent-systems-fan-40-01154-4 .html Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com AOL IM elcpls --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus