''Is kuskus the tiny semolina grain we call couscous, or is it a spice'' ? it is a spice http://www.mangaloreanrecipes.com/recipes/mangaloregoa/poultry/1353-kuskus-khaskhash-poppy-seeds-culinary.pdf
FYI, Penzey's carries white poppy seeds. http://www.penzeys.com/cgi-bin/penzeys/p-penzeyspoppyseed.html
Thanks pauljoseph. I'm planning to make the vindaloo tonight! Thanks hardlikearmour, I have a Penzeys nearby which I can try if my local Indian market doesn't have them.