I'm sorry to hear that all of your babies really hate to have their teeth brushed!
Sydney loves it!
Here is the brand I use since you were asking about the finger brush. The brush is very soft and the toothpaste tastes yummy. I think if you let her taste the toothpaste first, she may warm up to it. For Syd it is all about the toothpaste. The fact that I am brushing her teeth is just a minor inconvience. Plus when I am done I let her lick the extra paste off of the brush. It's worked for me.
ps. The only place I have ever seen this brand of brush/paste is at PetCo...but if you really want it and don't have one in your city...they have a website.