I got mine from Aldi - many years ago for just over a tenner - I've found all sorts of uses for it, besides airbrush cleaning - glasses, and stainless steel watch straps - amazing the crud you can get off them!
Dave
I agree with Dave. Not expensive and lots of uses. A quick go in the ultrasonic with the airbrush needle and nozzle and amazed at the muck that comes out.
Jim