If you sign up with Dukas for a free demo, their JForex client has a very powerful historical data manager which allows you to download the tick data over any period or turn it into bars in virtually any format you require.
An 8 minute candle or a 27 tick bar? No problem, if you have the need :-)
You can also select from a variety of date formats, file formats etc.
A great service to the forex community.
