The database is really nice, but not inclusive enough. There are vast ranges of Sunon and other brands (12V fans) missing from the list. Did I see, for example, any Panaflo's in that list? Oh, yeah. At least some.
The model number sometimes indicates the fan-size, but the convention varies from manufacturer to manufacturer. So the database needs some additional "attributes" or columns. That would include info about tails, monitoring wires and amperage draw.
Those folks at Sidewinder are pretty good, and often respond personally to e-mail inquiries. Of course, that could change if they get inundated like Santa Claus at Christmas.