Your search for "kitty buttons" revealed the following:
Elan - 2-Hole Button - 15mm - Cinnamon
$1.25 CAD
Cotton - Litter Ary Cats - Script - Indigo
$16.00 CAD
Dritz - Button Flat Head Pins - 50 pc
$9.75 CAD
Cotton - Litter Ary Cats - Purr-Fect Prose
$16.00 CAD
Moda - Cotton - Funny Valentine - Kitty Love
$23.75 CAD