I find your 5 and 15 year information to be quite helpful but I was wondering if you happen to offer data files of end of day futures trade prices?

Unfortunately, we can not resell any of our raw data.  However, below are a few websites of possible futures data vendors.

CRB
Real-Time Service
Internet Service
History, End of Day Data, Charts
http://www.crbtrader.com/

PriceCharts.com
Browser-Based Charting, End of Day Data
http://www.pricecharts.com

FutureSource
Real-Time Service
Compatible with popular software vendors
http://www.futuresource.com

P.C. Quote, Inc.
Real-Time Service
Works with popular trading software packages
http://www.pcquote.com

For more information please visit:http://www.mrci.com/vendors.php

Also, some of the exchanges make data available for free.
Such as the CME Group:  http://www.cmegroup.com/

We do provide End of Day, (Open, High, Low, Close, Change, Volume & OI) futures prices, free of charge here: http://www.mrci.com/ohlc/index.php & historical prices going back to 2000 within our End Of Day Prices here: http://www.mrci.com/ohlc/history.php Please note: unfortunately, we are unable to sell this data in any other format than how it is already presented on our website.