I spent years thinking that I should buy one some day, but "not now" since I don't scratch that often anymore. I was devastated to find that Thomann removed this from catalogue a while back and very happy when it re-appeared listed into Thomann site, so I bought it instantly when it was available again (I browsed Ecler products by chance to see if there was something new and was positively shocked to find this fader listed again). Only other place in the world where I was able to find this for sale was double price + taxes + customs toll into EU.
This fits even some if not most of the older Nuo 2.0 mixers, mine is more than a decade old. Works like a charm, but very challenging to install due to at least my older Nuo having very limited space inside. I had to practically dismantle the mixer and put it back together, which took some time, but it was worth the trouble due to the fader being silk smooth. Wasn't difficult either if you have spent any time with a screwdriver, but you have to be careful not to break anything and some of the wires are delicate. Also take care that you install the fader in correct position.
NOTE: check out the serial number, as this fader will only work properly with Ecler Nuo 2.0 starting from certain date! You can find the info from searching the internet forums (Google search will get you far) as I was able too, but unless your mixer is very very old you should be safe.