Alex, your tenacity is impressive!
This whole phenomena has been covered on the previous thread in great depth; the information you should have gleaned is that we try and avoid these conditions if at all possible. IMHO, attempting to get a ride on one of HM's few remaining ancient chariots with a view to filming static discharges, strikes and plasma balls would probably be met with
unless of course your production company is prepared to pay a large wedge into Gordon's coffers! NOAA is your best bet for hunting adverse weather conditions:
http://www.aoc.noaa.gov/aircraft_lockheed.htm
Doubt if you'll get better footage than that posted by
gravanom on the previous thread #46. A bit long but gives a good indication why aviators don't like the bumbly stuff - not sure which is scarier, the wx or the boom op.!