When I was in nursing school at UC San Francisco, there was a group of
volunteers, retired people, who were called "grandparents" and worked in
pediatrics.  They did things like rock babies whose parents weren't there.  A
very nice program.  I don't know if it still exists.

As far as older people being a source of knowledgeable support for
breastfeeding, I think that at least in the US, we've gotten past the point in
history where most older women breastfed or where very many people were alive
when breastfeeding was truly the cultural norm.  My mother is 82 and I was
born in 1943.  That was already a time when few women succeeded in
breastfeeding.  She wanted to but "couldn't" mostly due to horrendous hospital
practices  - general anesthesia for birth, two-week stays with bedrest for 10
days after a vaginal birth (!), baby kept in the nursery and brought out at
4-hour intervals whether fussing, sleeping or whatever, absolutely no help or
encouragement from nurses, doctors or anyone else, being told the bottle was
"just as good".  Breastfeeding may have been still the norm in some parts of
the country, but it certainly wasn't in central Missouri.  Miriam Levitt RN,
IBCLC