The BladeForums.com 2024 Traditional Knife is available! Price is $250 ea (shipped within CONUS).
Order here: https://www.bladeforums.com/help/2024-traditional/
Was kind of curious about this stuff as well just with gas. Was looking at those 100cfm inline ducting blowers. Not sure if they have enough umph though but they are really cheap (@25 or so on ebay).
This type works well but doesn't meet your price point. Has an adjustable intake flap to control air flow.
http://www.grainger.com/Grainger/DA...cm_sp=IO-_-IDP-_-RR_VTV70300505&cm_vc=IDPRRZ1