Hi Guys I went out last night in my 1978 308 GT4 and everything was great, turned the lights on to come back and the left hand light just made a horrid noise and the light didn't pip up. Today I stripped the motor down and the cog/gear with shaft (that connects to headlight lever) is totally warn out. looks like the worm gear has torn the lift cog to shreds and all the teeth have gone.. is there anywhere you know of I can buy this gear.cog please?