I had a similar experience last weekend when I was transferring some files from an SD card and my wife undocked the TF and all of the files looked like they copied but showed a 0 Bytes file size. Luckilly I still had the originals. Since you do not have them, my best advice is to check the microSD card and see if they might happen to still be on there, or to copy the files you have (even at 0 bytes) and try reading them with another device and hope for the best.
Also, I am not aware of a recycle bin folder on the TF.
I wish I had better news for you.