As the title says....I have some 12" fans for sale (from a good swap I did)
They are simple and straight forward 2 wire...they are "pushers" so mount in front of the radiator or if you made a simple cowl could be made into "pullers"
the real good thing about them is their depth....only 5cm or 2" in old money, have tested them on a battery and they don't half shift the air for a small fan ideal for our purposes.(keeping one for myself)
price wise...£!8.00 posted (this country) or £12 picked up I have 6 available
this is what they look like