I found my dog bag 2 weeks ago thro' the site in Paris and it is very good price cos it is a 2nd hand, only 5 euros as it was 37.50 euros in original price. It was for the cat before but it is good for dog as well. Since then, I can go out with my 2 babies much easier and they have a better comfort.
However, it is not so wonderful as useful as yours, there is less functions.....than your bag.