This is from the FAQ a section in Support, the Model Packs and Licenses page:
https://kb.line6.com/model-packs-licenses-faq
Q: Can I transfer model packs from my account to a different account?
A: Yes. This is called "gifting" (see how to gift below).
Q: How do I gift a store order?
A: Log in to your Line 6 account, visit the Purchase History page, and click the Details link for the order. Click the link/button labeled "gift", then enter the destination Line 6 account username and click confirm. The order will still show in your account history, but you will not have access to the license(s) from the order, be able to return it, or be able to gift it again. In the giftee's account, they will see the order in their history, but not be able to return or gift it. They will have access to all the license(s) in the order.
You would need to find someone willing to gift their license to you. Ideally, that someone would respond here and proceed with the gifting. Note that the above FAQ is quite old, referring in other paragraphs to the now-retired License Manager. There’s a banner at the top of this page providing info about that.