Dr Seeds oral BPC is an option. For injectables Peptide Sciences is a reputable source, and if you have a prescription and a lot more money, Tailor Made in KY is the source. Applying a bit of perspective, I would take product from the other companies, who I believe are all reselling China-sourced product long before I would take "legit" statins or, specifically to injuries, "legit" cortisone shots or any form of surgery, or other high-risk low-reward drugs/procedures. The only issues I have heard of with the China product is it being under-dosed in some cases such as MT II, although in fairness, that could be the reseller's doing. HGH had some issues but that is a more complicated product. I have had a number of nagging injuries heal completely while using BPC/TB 500, as well as some other things like DMSO, however since I can't run a controlled trial on myself, I don't know how much they contributed. You can see a guide to the basics of joint injuries here:
Fixes for Joint Issues: A list of Some Basics