I imagine they have to be reproduced somewhere with their prevalence on Boso rides... they couldn't have raided every Cherry of it's taillights... could they? ops:

I've got an idea for a pair if I could acquire them... I just wonder if there's a way to find them at all? Some of the Boso-mounted ones I've seen don't seem identical to those on X-1s, so I presume that they're using an aftermarket knockoff.