I've done some research on this and there are a few options :
1) Julie Wiebe of Interior Fitness (www.interiorfitness.com) helps women recovery post-birth from the inside out. Her method 're-awakens' the pelvic floor as it's the central hub for all activity for the whole body. Her presentation has incredible information about what happens to our bodies after birth and how most of the time, the body does not restore itself. She does not believe in body braces. Have a look at her bio, she's very experienced and knowledgeable.
2) Just recently on Savvymom.com, they featured a woman who works on the physical aspect of pregnancy and postpartum health at www.coreexpectations.com
The feature also discusses Diastasis - a separation of the abdominal muscles (this happened to me) - and this site works on repairing these muscle using the Tupler
Technique, which includes a splint you wrap around you (find out more on the technique at www.medicinenet.com/script/main/art.asp?articlekey=56021 )
** I have not tried this approach.
3) I've been thinking about purchasing this product (see link below) because I too had a csection and diet/exercise aren't doing the trick. It's made of the same material they use on burn victims so it's completely breathable. Now that I've read some of the comments, I think I will! I've also read that in several cultures, they bind women after birth to help the body restore ...
Let me know if you're interested in this product, I may be able to get us a good price.
http://ardysslife.com/ProductPageReshaping.aspx?ItemID=1008&ID=nylahasan
anne marie