I bought some lights for my son's Luego from 'Premier Wiring' at Newark Show....£25 the pair. Casing is all plastic, but looks strong and more 'racecar' than 'Clasic Lotus Seven'.I'll send you a photo if you like.
There are loads of restriction on where your indicators are where they can be seen from etc. Have a look at the SVA manual, linked from the 'SVA Information.pdf' thread on this forum. It's all in there.