If you are wanting to get her in with a trainer right now, Rody Best or Kirk Wichman are both solid trainers, relatively close to BCS. Adam Bally is a great trainer from Wisconsin who winters down here. I think he usually gets here around mid to late Oct.
Casting is usually not that difficult to teach if the dog already has the basics you mentioned. If you have the desire to do it yourself, join the Bryan College Station Retriever club and get help from some of the members. I am in BCS, I use Evan Grahm's Smart Works training program. I will lend you the manuals and DVDs if you like. Shawn@kelsoarms.com