I see that a lot but if you are going through a dozen of them in a year is that really any more cost effective? Properly maintained an Epson head will easily last a few years and if one is resourceful you can easily get a new replacement one for well under a grand. Of course you can always pay the rip off price from a dealer as well.... Granted, replacing a DX4 printhead is tricky at best and requires some skills and knowledge of how to properly do the alignments. The newer single DX5 heads however are very easy to replace, takes 20-30 minutes and pretty much run a quickie 3 minute nozzle alignment. Sorry, all the hype and whatnot with the HP latex "is the bees knees" and whatnot gets tiring to me. If it requires dual 220v 15A circuits so it can cook the ink (and material) is it really all that much more enviormentally friendly? The only benefit I have found so far really is that the ink (usually) is dry right off the printer and does not have the airborne VOC's.
As far as being actually on topic and not a flame post.... do not have one. It's really just an ultrasonic cleaner and my guess is probably a mimaki/roland style peristaltic pump and motor hidden in a little box. You can probably built one that will work nearly as well for dirt cheap. Of course you woudl not have the extra fancy machined plate for the head to sit on.
Just get an HP heads are $100.