Modulator: HDMI video input, RF output on 787Mhz.
VFO: Frequency set to 500Mhz. Available from Aliepress for about $40, search for ADF4351 Signal Source VFO Variable-Frequency Oscillator Signal Generator 35MHz to 4000MHz Digital LCD Display.
Ring Diode Mixer: Combines the modulator and VFO frequency for an output on 1287Mhz
Aluminium box contains 2 x LNA rf amps. Approx cost $13ea, Search on EBAY or Aliexpress for Low Noise LNA 0.05-4G NF=0.6dB RF amplifier FM HF VHF/UHF Ham Radio.
1280Mhz Band pass filter Cost is approx $45. Search ebay for 1280mhz band pass filter SMA interface 1220mhz-1340mhz.
RF Amp from Minikits.com.au
I had to use this to get enough power to drive the Mitsubishi M57762.
Final RF (not shown in the main photo above). Good luck trying to find a working module online, not sure the PCB and parts are still available from minikits.com.au