I'm SURE that you could get these in Topshop. They're real good for different sizes, like I have to get the Petite jeans cause my legs are tiny, but they do a Tall section aswell.
Those sorta jeans are taking over skinnys now, so they'll be everywhere. They've got a good selection in Miss Selfridge and they do a Tall section in the larger stores.
Alternatively, As Seen On Screen www.asos.com does a whole load of clothes as seen on celebrities. So you might get a pair there.