I understand your addiction to bags, I can't help myself. Most of the pet carrier bags are so oversized for my frame, I end up looking like I have my carry-on luggage over my shoulder. I found a large canvas bag (cheap) and am going to try to modify it and make a scaled down carrier. Ruby is tiny and for a quick run for milk, something smaller would be okay. I'll let you know how it turns out.
I bought one from Target and I like it, but I feel like I'm carrying a piece of luggage. I like the one you found, it does resemble a purse more than others I've seen. This gives me an excuse to keep shopping, darn!
I've been told Gordman's has them sometimes, so I may check there again.