Actually, I've never toasted my own as it's readily available at all Polish shops at a reasonable price (lower than any internet source I can find). Home toasted might be even better...
Incidentally the internet is confused about whether kasha is toasted or un-toasted groats, but my box says:
"kasza
gryczana
prazona".
£1.89 for 400g (bought some months ago - my wife prefers any rice, not just Basmati).
I'll add one more thing to the list I like much less than kasza - I would rank quinoa only slightly above couscous.
Cheers.