No te puedo decir dónde comprarlas en tienda física pero en la red se encuentran. Marcas que las tienen son J. Herbin.
"J. Herbin scented inks are made from floral water (hydrosols) of rose, orange, lavender, apple and violets. The hydrosols used by J. Herbin come from Grasse, France, a Provencal town long associated with the perfume industry, and famous for its floral scents.
Known as “Les Subtiles” (The Subtle), each ink matches fragrance and color: bleu/parfum lavande/10; vert/parfum pomme/34; amber/parfum orange/41; rouge/parfum rose/68; and violet/parfum violette/77"
Y De Atramentis
"Dr. Franz Jansen hand produces this brand of fountain pen inks in Germany. The scented series is suitable for fountain pens. Encased in elegant glass bottles, these inks come in a variety of hues that evoke the colours of the objects that inspired them. A bottle of De Atramentis Scented contains 35 mL."
Me suena que Montblanc tiene o tenía algo pero no estoy seguro.
Un saludo,
Rafael