Where can I find a stand-alone coffee wand for home use? I'm looking for a stand alone steam wand like the Dualit Cino .
Do such machines exist nowadays? 

Ps. The Dulit Cino doesn't seem to be available in the US and is a bit expensive for me.
If you want to save money, look to the technology of 60 years ago and seek out a stovetop steamer. Possibly easier to find at a thrift store than online, at least at a bargain.

Then again, you may well find a thrift-store "espresso" machine that you could dedicate to only using the steam wand on, even if you'd never dream of making coffee with it. May also depend on the thrift store, or the week (given that stock varies with what they get.)