Configuring LEDs on a Netgear WNR3500v2

Hello all.
I have successfully compiled, installed and configured a custom LEDE 17.01.7 for a Netgear WNR3500v2 (not the L version). I was even able to unlock it's 64MB RAM, so the device works smoothly. It is meant to be just a backup device.
My question is related to the LEDs configuration.
The LAN and wireless LEDs are directly controlled by the broadcom chipset. The POWER and WAN LEDs are static orange. I would like to configure rules for the POWER LED (static green) and WAN LED (blinking green). Only b43 wireless options are available in the LED name menu, no POWER nor WAN. Is there a way to configure these two LEDs ? Maybe a missing package ?
These packages are already installed : kmod-leds-gpio, kmod-ledtrig-default-on, kmod-ledtrig-netdev, kmod-ledtrig-timer.

Thank you for any help.