Supposedly pickling lime is a banned food substance in Canada, so you won't actually find that anywhere, unfortunately. Unless you go to the U.S. and bring some back yourself.
That said, check with Canadian Man to see if he has any left (since he had done just that at one point).
Most of the kalk I'm using right now I just picked up from people who decided not to use kalk anymore ... so I'm not the best person to ask where to get the stuff at a store ... but when I do run out I was just going to order a big tub of kalk from
www.mops.ca. Something like this:
http://www.mops.ca/cgi-bin/SoftCart....5e8+1085784432
Hope this helps...