I would suggest using IGF-1 DES. Making injections near the injury right before and/or after physical therapy. HGH would probably help a bit too. but IGF-1 DES is probably your best bang for the buck.
I'd also buy collagen in bulk off amazon and eat like 5-20 grams of that a day too. And buy BCAAs in bulk and eat 20 or so grams of them a day too. Those stimulate collagen and protein synthesis. Combined with local IGF-1 DES injections around the injury, you will have some epic healing occurring!