You've probably found your answer to this already, however, for the benefit of others I will post this response...
As you know this is a separation of the abdominal muscles due to tearing of the connective tissue that hold those muscles together. Generally, this is found in women due to pregnancy, massive weight loss or similar strained situations of the muscle.
This is a muscoskeletal issue and proper tissue and muscle support can be provided through a customized training with a certified trainer, and health and repair support can be provided through natural, whole food supplements formulated specifically for muscoskeletal issues.
We can help! We have a nutritional health test which identifies if the muscoskeletal system is weak, stressed, or in balance. Once we know, the results of the test recommend specific practitioner-grade whole food supplements which will bring your body into balance.
We also have an on-site personal trainer who uses very customized routines geared to the individual. These workouts/training are low-impact from the standpoint of strain, but high-impact as to results.
Check our website for more information at MeridianHealthAlternative.com or call us at 990-9757. We are located at 2601 Juan Tabo Blvd NE, Suite C, between Menaul and Candelaria on the West side of the street.
We also provide acupuncture, which can help your body in the healing process by addressing pain or discomfort caused by diastisis recti. It also helps to maximize the healing potential.
Of course, we have great package discounts, since most people require at least two of the services we provide.
I have the same issue, and spent about 6 months doing physical therapy to help strengthen my abs. Depending on who you listen to, it's either impossible to fix, or possible to slightly improve, depending on the severity. Certainly you can at least add some strength back, and learn how to not make it worse... (And while it's VERY common in women during pregnancy (30% or so), it's also reasonably common in men, particularly those who do a lot of heavy weight lifting.)
My therapist was at hte Presbyterian Healthplex (near San Antonio and I-25). Her name was...Linda something. Can't remember. But she specialized in this type of thing, and I would suggest her as a starting point.
Whatever you do, first get the advice of a therapist who specializes in this sort of thing. Pretty easy to make it worse, and even if you find a DVD geared toward this, you may not know if you're really doing the moves properly. I found the different between "correct" and "incorrect" to be fairly subtle.
For the record, after 6 months of therapy and many more of continuing on my own, I was able to somewhat reduce my separation (which had been 2-3 fingers wide, and about 9" long), and add a reasonable amount of strength. However, visually, it's still fairly obvious and I have nowhere near my pre-pregnancy core strength. Only way to do much better is surgery, which insurance basically never covers (even when deemed medically necessary by a doctor, except in some cases of extreme hernia...)