The Yamaha 9000Pro has 76 keys and available nearly everywhere. It is one of the most popular and powerful pro arranger keyboards there is currently. It's such a specialized instrument that it may not be kept in stock in the music stores in your area (this is true even here in the US), but it can be ordered through any Yamaha keyboard dealer or purchased via the internet from many online music stores. Many of the pro performers in this forum use the 9000Pro and like it very much.

Here is more info on the 9000Pro: http://www.yamaha.co.jp/english/product/pk/pk2000/products/pro9000/pr9000_b.htm