I have a couple of NOS switches for sale...One is the 4 position WD type..brand new and perfect. The other is an unusual one..It is a 3 position civvy type but not of Lucas manufacture (at least it is not marked Lucas).However, it is NOT one of the Indian replicas, but more likely a much older replica. The switch positions are 'low' 'off' and 'high' in that order. Both switches came with some parts that have been out of circulation for at least 30 years. The civvy switch appears to be a good quality item.
The WD switch is £50 plus Postage, the civvy one £20 plus postage...Ian