Firstly , from reading the American boards , i believe Tony Dang had a serious stroke a couple of months ago so it out of action and condition unknown .
I got one direct from him a couple of years back , Its a really good wand , the two inch pipe and special head really do seem to maximize your airflow /suction on the carpet . How ever i find the 2" pipe and especially 2" hose direct to 2" pipe awkward unless you are doing some large empty place .
So i seldom use it now and perfer the simple glided westpack 12 . But its personal perference , i believe he was developing a 1.5" version with a 12" head , i might like that one more for general use .
TMF shop had some deal with to OEM produce their wand , that might be an option or there may still be some for sale in various places . But i wouldnt bother , especially with a portable .