No amount of bits is going to stop a bucker (I had one that wold buck even with me hauling on the bottom rein of a pelham) and a twisted wire bit will just make him worse because you are introdcing serious pain into the equation and then run the risk of him going from bucking to bolting which is infinately more danerous.
Whilst the idea of Cheries daisy rein is not a bad one to stop the problem, the fact that it is rope and attached to the horn of a saddle (which if you ride english doesnt exist) could cause Major issues and damage. It also doesnt solve the root of the problem and you can bet that as soon as you take it off they will start again. If ou want to try this as a short term measure then you can buy a much safer daisy rein (same principle except will snap if the horse gets hung up on anything)
First thing I would do is rule out any form of pain
Personaly when I had stan, he used to buck for kicks and giggles with very little warning (sometimes no warning) if I felt it coming I alwas hauled his head round to my knee (as in actualy touching my knee) and then spin him untill he was blowing hard (once span him into a ditch). If I didnt feel it coming I trained myself to relax into the first buck and then haul his head round before he could put a 2nd one in!