The OEM online parts sites I list at the site below have had
every OEM part I needed in the last few years for my 1991
Civic. Note that they claim to have parts for Hondas dating
to 1973, though I imagine, as you suspect, the older the
car, the less available OEM parts will be.

http://home.earthlink.net/~honda.lioness/id9.html

"David E. Powell" <David_Powell3006@msn.com> wrote
> Quick question:
>
> If someone was to have a Honda that was 10 or more years
> old, (15?) how
> likely is it that Honda or after market new parts would be
> available?
> Not just big items, like motors or custom gear, but the
> little things
> like fuel filler tubes, small parts, etc?