Bulb problems on iped?

I have an iped electric moped with pedals which I believe has a in hub motor ( haven't looked yet) the problem I have is this the replacement bulbs are almost impossible to find The headlight for example is a 55volt 36/36 which I am finding impossible to find  the rear brake light is 55 volt 15/15 watt unsure of the wedge bulb parking light which is 5mm width and there is definitely no 55 volt wedge bulbs this size The only conclusion I can think of is to insert a dc converter which will drop the voltage to each bulb from 55v to 12v giving me more availability on bulb selection I am just curious if any one on hear knows where I can get 55volt bulbs ? I also noticed a post on here regarding someone looking for extra speed and was answered with disconnecting the grey loop wires under the top cowling Well done that man you gave good advice I done mine myself and yes the increase is there I don't know if I have to keep looking for answers on this but my email is nickcorish@gmail.com if anyone can help Many Thanks all Nick