Has anyone tried fitting Piranha LED taillights to their van? These
are circular units, about 90mm diameter, sold for big rigs. I just
noticed them today in an autoelectrical shop. They are available in
red (tail/brake combined) and orange; they are inquiring for me as to
whether white is available (reverse).

These are ideal for me, despite their price of $30US each, as I was
thinking of Skyline-style double-donut taillights for my Caravelle.

To fit these I'd pull the stock lights and make up an acrylic or
similar clear-smoked (or maybe satin black) rear panel to fil the
depression under the tailgate, and put in 2 pairs of red lights and
one of orange... and one of white if available. I would look at
painting black discs in the centers to make them resemble Skyline
lights (tack black card in first to ensure they are still bright &
look good).

Anyone know if they ARE available in white?

To fit you cut a hole and press-fit the rubber surround, then push
the waterproof light in.