Hi
There's a fairly big scratching post on amazon for about £50, my friend has it and it is near enough to the ceiling.
http://www.amazon.co.uk/Leopet®-KBD008-2blue-Scratching-Height/dp/B007K5NQ8G/ref=sr_1_5?ie=UTF8&qid=1394807554&sr=8-5&keywords=cat+tree
Its lovely as well, and comes in a few different colours :)
Also as well, There as things called 'cat shelves' I havn't seen any in person but online they look really good.... they're basically fancy shelves that go up the wall and cats can climb as high as they want. I will be sorting some cat shelves out when I move house soon.
Hope this helps!