A British company called Etruk is building a range of small scale biodiesel
reactors that range from a 40L unit suitable for people with a single car to fuel up to an 1,150L unit that's suitable for businesses or farms. The reactors can process either virgin feed stocks like straight vegetable oil or used vegetable oils. The company also offers training on how to use the equipment as well as safe handling of the fuel.
Prices range from about $1,800 for the smallest unit up to about $4,000 for the biggest setup. So far there's no information on US availabiltiy and it may in fact be illegal to use this device here. The EPA
has made it clear that it's a a violation to even use waste veggie oil as a fuel without a license.