Uhhh, yes, digikey. We buy single stuff all the time from them.
Hey, Pablo, is this a ducted system? Does it have relatively long air passages?
A tube axial style may have problems in that type of installation. You might have better results using a centrifugal blower, available about the same size. free air CFM is a lot less but they will work against pressure. Tube axials need pretty much open air and no ducts, as soon as you add ducts the cfm plummets.