Where to get US dollars in France

Planning our holiday. we need to get US Dollars.

Does anyone have any good references? The last money I tried to change in Nov £ to € was difficult. Previously the post office here had always done well but this time they said I had to go to the Bank de France, The Bank de France then told me to go to a bureau de Change in Toulouse 2 hours from where we live ( north gers) I got a rate from Credit Agricole bank but frankly it was not a good one compared to the commercial rate offered by transfer.
As this is for a holiday we can't transfer to a bank at our holiday destination so any help would be appreciated.