Also has anyone built their own devices using Beck's blue-prints? Are these blue-prints available anywhere, especially the magnetic pulser ?
I use Sota Equipment for the Magnetic Pulser and the Blood Cleanser. You could use the Blood Cleanser to make Colloidal Silver but I haven't, instead I use a Silver Puppy. Ozonators can be had for as little as $45. http://www.ozone.enaly.com/OZX-300U.htm
You could make everything on your own except the ozonator. The biggest challenge is packaging them into a nice, neat, safe, usser friendly form. If you have all the time in the world.