You can buy all the Mastersoft programs through Handango.

Author Notes:
About Mastersoft Money:
Mastersoft Money for Sony Ericsson P800 is an all in one self contained personal finance manager based upon our original award winning best selling Mastersoft Money(PoQuick). It is a complete replacement for your desktop financial package and does not require the use of a desktop computer. Mastersoft Money is the World's most popular mobile personal finance manager. Try it now and find out why !
Mastersoft Money utilizes the very latest technology from AppForge.
Features:[list][*]A complete replacement for those expensive desktop money applications ! [*]Emphasis on visual simplicity and ease of use. [*]Capture those expenses on the go then view graphs, reports and charts of your financial health. [*]Incredible value for money and no need for an expensive desktop computer. [*]Free upgrades from V1.00 to V1.99 (we will add user requested enhancements regularly). [*]By far the most fully featured Sony Ericsson P800 personal finance manager yet it's so easy to use you will be productive from day one ! [*]Designed by you ! Built by us. [*]Fantastic performance.[/list:u]
More information about Mastersoft's other programs is available via their website.