Did you try a general web search (i.e. Google or Yahoo?) You may be able to find the publisher's or distributor's site...some of them may allow direct ordering.
Good luck in your seach.
__________________
"...I'm not yet where I want to be, but I'm not where I was, either."
- Cornell Williams
I have found that sheetmusicplus are very good for ordering books etc - they ship things to me in England very quickly and cheaply, although they are based in the US.