I have been working on just throttle for years,a simple £10 clutch from ali express,download the wiring diagram ,rewire the new throttle to replace the old one
you dont know how much this has saved me have spent hours trying to find an equivalent control box but very little on cyclamatics ,sent off for a new clutch because i think that was the problem ,i assume a general 3 wire clutch would do as opposed to the standard cyclamatic clutch