LEAP is a family of protocols rather than being a single protocol, and some members of the family are subject to patents. We cannot make code available for the entire family because of the patents.
You will need to narrow down exactly which LEAP you need, and you will need to conduct a legal check to determine who has the right to that particular application and you will need to secure permission from them. This might involve consulting a patent attorney. Certainly it is beyond the authority and expertise of anyone who is likely to read and respond here.
