Greetings Glyn!
On my '64 Overlander, the formica sink covers were a $6.00
option. The center portion of each cover is 3/4" plywood
that is shaped to fit the contours of the sink bowl. A 1/4"
plywood top (to which formica matching that of the
countertop has been glued) shaped to cover the perimeters of
the sink itself. Each of the covers has a 1" hole drilled
centered in the top edge to act as a finger hold when
removing the covers.
I don't know if this would have been the case with your
later model Caravel.
Good luck with your investigation!
Kevin D. Allen
WBCCI/VAC #6359
1964 Overlander International/1999 GMC K2500 Suburban
1978 Agrosy Minuet 6.0 Metre/1975 Cadillac Eldorado
Convertible