I was just looking around for 868 MHz 500mW radios when I stumbled upon this radio --> http://www.radiocontrolli.com/en/products/transceivers-module/modulo-transceiver-868mhz-high-power-version.html
As it is Si1000 based then the SiK firmware should run on it as well. It would be a great alternative for European guys looking for longer range while still taking advantage of the SiK firmware. It uses the RFX1010 amplifier.
What do you think, would these modules work as a drop in replacement to 3DR radios?