You can get the drivers from EastShore Trade's site here: http://eastshoretrade.blogspot.ca/2014/03/driver-important-reference-gridseed.html

Right under where it says " IMPORTANT If the driver not works, you can also try the drivers below". The first is CP210x and the second is STM32.  Once Google docs open click one File then click on Download. Do that twice; once for the CP210x drivers and once for the STM32 drivers which happen to be named LIGHTNINGASIC Gold miner USB driver_V1.3.1. I use the second one.  All of my pods are STM32.  I think all newer ones are. Probably from early March is my guess.