FYI, for US readers, Sunon makes an equivalent fan, the KD1204PFB1.

Also FYI, is the ADDA 12vdc 40x6mm fan. I ordered two from here:
http://www.mouser.com
and part # search AD0412MX-K90
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-- Terry K -- 30Gb Smoke / Toyota 4x4 30Gb Amber / Bounder RV Pants first, then shoes