Seconding the other commenter, I actually /only/ get armature wire at hardware stores (or stores with hardware sections) haha! It's the stuff with no coating that you want; coating tends to work its way off in my experience. If you art store sells any plasticizer/clay softener, you can probably make your old clay workable with that! I got some and it was totally worth it.
As far as sculpting tools, a lot of things will do if you can't find an art store that sells them (or want an alternative) : D I love crochet needles of varying sizes for detail work and smoothing. Can usually grab them cheap at Walmart down here, don't know about up in Canada. Also do you guys have locust trees or anything similar with the big thorns? Those make pretty good sharp detailers, and you can customize them easily with some sandpaper and a knife. And an xacto knife is also a super useful sculpting tool btw.
I wish I knew some sites to link for you haha, but this is what I've got. Good luck! I'd love to see what you come up with, it's so cool seeing how people's styles manifest in 3D