Where can I find firmware and configuration files of digitizer?

Previous user of my tablet tried to upgrade the firmware of the digitizer (MXT1386-U). Unfortunately he installed firmware and configuration of MXT 1664 and the touch screen stopped working. The device is still visible by OS and I am able to install firmware but i can’t find the files anywhere.

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 0
crwdns2892346:0crwdne2892346:0