Can anyone tell me a source for obtaining quality 1 minute historic data feed for commodities, particularly softs. I'd like it in ascii form so i can import into multicharts. My broker IB only has symbol data which is 3 months for each contract but i'd like 1 file for many years of data.

Been on CQG and seen corn 1m data for 3 years is $1000. Is that what i should expect to pay?

You can do this with tradestation

actually tradestation has a few at least one month trial.