Hi All, just an update you may be interested in. i have replaced turn signal switch with filling station heavy duty unit VT10. i purchased stop light LED conversion kit for 6 volt but haven't installed it yet as you have to remove all the bulb holders and i don't want to wreck a perfectly good unit so will get hold of a damaged unit which can be modified. I purchased third brake light window mount 6 volt (filling station LED-27) which works great.
The other problem was with the turn signals (in aus with have amber coloured separate signals) I couldn't find a supplier that had 6 volt negative earth globes for turn signals but after searching the www I came across classic dynamo and regulator conversions in the UK (
www.dynamoregulatorconversions.com) from them I purchased 4 x 6v21w amber BA15s 9 LED neg earth globes and 1 x LED compatible flasher unit 3 terminal. It took all of 2 minutes to install and works perfectly.If you look up their web site it has a lot of information re LED lights etc.
In October they will have replacement globes for 6 volt head lights. hope this helps regards peter.