RAOGK has a listing of people willing to do free look-ups in Louisiana Random Acts of Genealogical Kindness website. The site asks that before you make a request of a volunteer please read the FAQ page. Here is a list of questions from the RAOGK website:
Is this a free service?
How do I make a request?
How much can I ask of a volunteer?
How much information about my ancestors should I send to the volunteer?
May I send the same request to more than one volunteer?
There is no volunteer in the area I am researching, what do I do now?
What should I expect from a RAOGK volunteer when requesting information?
Will RAOGK volunteers look up information on the living or help those looking for their birth parents?
Do RAOGK volunteers do in-depth researching?
How often do the volunteers do lookups?
When can I submit a different request to that same volunteer?
What if I receive no response from the volunteer?
What if my email bounces back from the volunteer?
How do I thank the volunteer after my request has been filled?
What else can I do to show my appreciation for the lookup that was done for me?
Where do you get your volunteers?
GeneaSearch also offers a free look up service on its site for Louisiana.
Books We Own also offers look ups for your surnames in several parishes in Louisiana.