Hey pum'kinpye, You may wish to pm Pennywise, I think she is from NS, maybe she would know of some stores closer to you
When you go to Halifax at the end of Sept be sure to go to Michael's as you just may find them on sale by that time, then you could stock up
Another option "however they can be expensive there" is I know I have seen the Michael's potion bottles for sale on ebay, there are this years type and also the type from last year.
If you want to see the kind I bought from Michael's you can check them on on this thread as I did two posts of things I have bought, and the potion bottles are on there, just look on page #1 of this thread
I hope to take pictures of the latest stuff I've bought but right now things are a tad busy. Hope this helps