I know that it's hard to find Rose's blue leather bomber jacket from series 4 (I spent several months searching for something similar myself), and so I thought I would share a link I found with you guys. It's not perfect, but it's close. It's a little lighter than her jacket, but the overall shape and style is there. It's only available in size L, though, and it looks like there's only one left in blue. There are two white ones in M, if you'd want to try your hand at dying it.
Edit: The blue one is gone now (I hope it went to a fantastic future Rose cosplayer!), but there are still two white ones.