Checking the OP’s link to the Jexree shop on Aliexpress, it looks to be out of stock… Well that stinks…
Yeah you are right.
I sent a message to them asking what up. I hope they haven’t stopped selling them forever……
It seems the Ultrafire LZZ-06 version is almost gone also 
EDIT
Did this happen? Wondering ….
I don’t remember seeing a thread about it from Billy X.
But I did buy a silicon mat but when i got it i had already realized that QTC limit max amp way to much, and i had started working on my driverless modes skills, and when you perfect the driverless modes handling there is no need to bother with QTC.