It’s a recent thing, but I’m afraid you can’t any more, unless you’re already a knitter for them. Presumably that’s because people have been using the patterns (designed by volunteers for the purpose) for commercial purposes.
The person who runs the scheme now has a waiting list for would-be knitters. You can put yourself on that if you like - the website tells you how.
She must have had a lot more donations than usual - the waiting list for therapists etc. wanting items has apparently gone down to 500, from over 1000 not so long ago.