I managed to construct a pair of rubber boots for the E-code
vanagon rectangle lights.  I bought two rubber pipe-like
fittings ... reducers with a hose clamp over each end.  $5
each.  They are about 6" long...and have to be shortened
about 3/4".  One end fits, with a little work, over the
bulb/socket area, and you can hose-clamp it for extra
secureness.  The other end is smaller.  I cut some inner
tube and used marine goop rubber sealant, and then basically
hose-clamped this diaphram-like "lid" over the small end
where the wires will come out....sealing between the tube
and reducer with the goop...all of which is held in place by
a hose clamp.  I cut a small hole in the inner tube top for
the wires, which I sealed with goop, and then taped over it
with 3M electirical tape.  It is sturdy, air tight and total
cost was about $18.

At least i can use them now!  And still glad David was able
to get them.
steve