Khari,I get mine from New York through E-Bay,refills are $16,95 US and I usually buy 4,with shipping and handling,it comes to $79 US.
I believe converted to Canadian $,it's just less than $100.
My vet used to charge $44C for a refill,$ 80 something with the diffuser,so I think it's a good deal.
Even if they start selling them here again,they will be too expensive.
"The cruelest animal is the Human animal"
3 kitties,Rocky(r.i.p my boy),Chico,Vinnie