Colloidal Silver Generators

I'm sure this question has been answered many times but I'm very confused!

I'm currently using MesoSilver, however if I were to continue it's going to start getting very expensive, which brings me on to the colloidal silver generator topic.

I'm looking to buy a generator, ideally something that's capable of creating a 0.65nm 20ppm solution (if that's possible) TRUE colloidal silver, not ionic. A generator that could do both would be a bonus for both topical and oral administration. The SilverGen SG6 and Silver Puppy seem to keep popping up here, any thoughts on those or any other advice is welcome!

One last thing to add, I am in the UK so shipping may be an issue.