They are not entirely gone from all locations. All the locations I've visited North of Toronto in the past three weeks (Markham, RichmondHill, Woodbridge) still had limited quantities of Bosch & Purolator on Clearence.
There are not many applications left (especially in the Bosch) but if you happen to find a few for your vehicle, it's a good chance to stock up. The Bosch are $5. The Puro classic are between $3.33 - $6, depending on size, and the Puro Synthetic range from $6-$10 (mostly $6 or $7).