Unfortunately, I believe the TF9 Junior sizes only come in standard width. If you're a Fit3 Bauer and EE in Tacks, I think you'd need a W in the TF9. The smallest size that comes in W in the TF9 is 6. 6 will definitely be too long for you. You'd likely need a 5 in length if you want a performance fit after baking or a 5.5 if you want a little room, but I think the R width would likely be too narrow even after baking.
Also, the TF9 skates are lower cut than Bauer. So, if a high cut boot is what you're after, I don't think a TF9 is the answer.