I purchased an encoder off AliExpress but it needs a firmware update pretty bad, the model is on-dmi-16d or on-dmi-16d(w) the box has it without the W but from some sites I have seen the wireless one should have a w at the end stating its wireless. I have searched high and low and cannot find anything on it. They are being mass produced but the firware is nowhere to be found. I actually purchased 2 of them and they both have different versions of firmware on them.
If there is an alternate firmware that can be flashed that has a little more control than what comes stock on the units I am willing to try it as long as the brick factor is relatively low.
here is a link to a search for them.
I would say cheap Chinese junk is not usually supported for long. Did you try Freaktab?