Hi. Yes, there are different choices for what to use in grafting such as patellar tendon, hamstring tendon, and donor tissue (allograft). Using tendons from other places like knees, hamstrings or thighs is commonly done. Here is a whole article on the ACL surgical repair that is very general but explains it. https://www.webmd.com/pain-management/knee-pain/acl-surgery-what-to-expect
Or is your doctor talking about BEAR (bridge enhanced acl repair surgery)? This is newer and one in which the acl doesn't need to be replaced but heals itself? It uses a sponge injected with your blood. There are supposed to be some promising advantages to this surgery such as faster recovery time and less chance of a retear. But it is newer and less is known about outcomes.