From what I have been able to determine there are 2-standard types of TFT adapter shields available; A 40-pin and 32-pin. However there is another one out there; the 34-pin.
The pin-out is shown on this wiki page http://www.geeetech.com/wiki/index.php/3.2TFT_LCD
The product picture can be gotten from this other forum post https://forum.arduino.cc/index.php?topic=370894.0
It seems to me someone could be making a little money putting together shields for these.