dog marrow bones -- where?

i have a dog, i give her marrow bones every now and then
marrow bones are the leg bones of a cow
with the marrow inside -- helps keep her teeth and gums healthy
they're sometimes referred to as soup bones

{but if you say soup bones, some people believe
you're too poor to afford meat and just look away
and stare down at the floor, never looking you in
the eye}

the only reliable marrow bone source{that i know of} has been this
italian butcher shop in Windsor Terrace, on Prospect Park West,
between 15th + 16th streets. two stores down from Farrell's bar

are there any butcher shops that sell marrow bones
that are closer to the Atlantic/Pacific/5th avenue area?

i live on 3rd avenue between Bergen + St Mark's
my preference would be a butcher shop where a portion of the
staff were missing a piece of a thumb or something.

this would be awesome