Repair of the Diastatis with Laparoscopic Approch?

Yes this has been done in the past and is called a endocorporeal repair of the diastasis recti. It is more commonly performed by general surgeons and although it CAN be done, it will be difficult to find a surgeon who will perform it as they typically do not believe it lasts. It probably has more risks than a traditional muscle repair because it involves entering the peritoneal cavity. However, I am not aware of a study that has compared the two. Endoscopic or fiberoptic assisted repair is probably your best option for a limited incision.

An endoscopic abdominoplasty was basically a repaire of the diastasis with limited incisions.  It wounds like you could be a candidate. It requires very specific equipment to perform this procedure, and I do not think many surgeons do it.

Although the laparoscope is not as commonly used these days for simple repair of the diastasis, you can have the repair performed through a limited supra-pubic incision. However, the more tightening of the muscle you require, the more the soft tissues overlying the muscle will get distorted. Because of the bunching up of the fat and skin, liposuction or redistribution of the soft tissue will often need to be done as well.