Oh, Jesus, the whole 'driverless cars' and getting hacked is frankly terrifying, indeed. If someone thinks its funny to hack the NHS, then that same person will think nothing of causing mass death on the roads for 'lols'... and that's before we consider organised Terrorism. Anyway...
Sadly the world is full of re-manufactured stuff for almost all the major Marques... but not the Griffin. The ABS has procured some repair panels for the Monza/Royale which is to be completely applauded, given the tiny tiny number of cars we're talking about versus, say MGBs, Minors, Minis etc... HTs, (canister) oil filters and so forth will always be available, they can be made in your shed. But ABS ECUs, crank sensors, and even ye olde top hat seal is a little trickier to envisage those being remade.
I say just be vigilant with Dealers clearing out old stock over the next few years, now's the time to get these things.