Cat suffering cataplectic attacks

Hi, Can anyone kindly assist a 17yr old cat suffering from occasional bouts of cataplectic attacks?
BACKGROUND:
Domestic short haired neutered male all white cat that enjoys playing, being stroked/patted and being touched. Likes to be close to us. Always sleeps on the bed with us and spends a lot of his time sleeping on our laps.
Not obsessive but persistent when he wants food or to go out. Indicates his desire by gently clawing one of us. Grumbles and backchats a lot when he does not get attention. Quite energetic and spends time both indoors & outdoors. Not really scared of rain or thunderstorms. Sometimes goes out during the rain and comes back soaking wet. Is given primarily wet cat food, both raw and readymade precooked packs. Eats well and drinks about 6~10 oz water daily. Stool and urine are regular and seem fine.
Tendency to over groom himself and frequently suffers from hairball congestion. Eats grass when this occurs which sometimes works and when given cat food in jelly it either digests the hairball or brings it up & out with some food.
CATAPLEXY & OTHER SYMPTOMS:
About two weeks after his last booster vaccination [Nobivac FeLV] on 31st July last year he started experiencing cataplectic attacks with sudden muscle weakness and semi-paralysis without loss of consciousness. The episodes are spontaneous, last a few minutes and go away by themselves yet he remains alert throughout the episode. During the episodes he does not collapse and fall but seems to have an inability to move - struggles to move his legs. Petting and comforting him during the episode seems to help towards a quicker recovery.
We have attempted to monitor these episodes since then in order to try and establish what has been triggering them. He seems to get an episode around once every week but this could well be misleading as we may readily be missing episodes when we are not near him. So far no trigger has been identified as these episodes occur randomly with no apparent warning and there appears to be no consistency on timing or activity.
Also experiences occasional brief shudders – like a jerky wakeup from briefly dropping to sleep while standing or sitting. Could well be a touch of narcoplexy. Seems very sensitive and readily agitated by noises, even slight sounds. Walks away from the door when the doorbell rings, ignores visitors when someone other than the family comes into the house. Advocate [flea] for cats & Milpro [worms] were stopped at start of the episodes as we had initially thought they may be triggering them. Switched to Frontline Spot on applied monthly on his skin for flea treatment and currently no worm treatment.
Other than the above, he is very well.
Would be very grateful for any Homeopathic assistance on the above problems. Thank you.