[Soekris] Source for 25mm fan for net6501

[Steve Mitchell]

Hello List,

Has anyone found a good quality, low noise fan for the net6501?  From
my measurements, it looks like it can accommodate a 25mm fan, but I
have yet to find one that meets my requirements.  I've found several
Evercool brand fans, but they are extremely noisy (+30dBA) according
to their specifications, and far to high RPM (13,000+).

Sunon makes (made?) a 10,000 RPM 25mm 16dBA model, but I've not been
able to find anyone that still sells it.

Any suggestions appreciated.