It's possible to repeat the surgery using graft tissue from another donor site or another donor. It's not advised to take tissue again from the original donor area. Even up to six years later, the donor tissue doesn't return to normal and remains thinner and weaker
But before you borrow more trouble, let the doctor take a look at you. Maybe the damage isn't as much as you think. Or perhaps the repaired ACL can be salvaged. If skiing is a must in your future, then a rehab program will be important for you.