Some options for canisters and bladders - https://adventuremotorcycle.com/gear/motorcycle-auxiliary-fuel-tanks
These ones are shaped to fit inside your saddlebags - https://www.reda.co/reda-gas-can
Good comparison of the different types here - https://www.nadaguides.com/Motorcycles/shopping-guides/how-to-carry-extra-fuel-on-a-motorcycle
Bum is still sleeping, so I can answer that for you. On the first gens the single antenna is used for both, on the second gens, oem is to use 2 antennas. There should be a splitter box on the 1st gens.
THE BOSS IS HAVING ANOTHER BIRTHDAY.!.!.!
Sure glad he is, for the alternative would not make me happy.
Happy birthday Don, and may the Good Lord, Shepherd and Father grant you many more in good health.