Download the current Firmware version
I offer the following firmware for the RT-N65U
RT-N65U_184.108.40.206-099.trx_Advanced.7z. This version include syslog and parted.
Language english and german and the Kernel version 3.4.
The same but kernel 3.0: RT-N65U_220.127.116.11-099.trx_Advanced.7z
RT-N65U_18.104.22.168-099.trx_Base.7z without syslog and parted support.
And RT-N56U_22.214.171.124L-100.7Z german and english. I've tested it, works without any problem.
RT-N65U hanwckf version
Use is at your own risk. I have used the original source code from https://github.com/Linaro1985/padavan-ng and https://bitbucket.org/Andy99 and https://github.com/hanwckf/rt-n56u