You can get Halyard Sterilization Wrap in different sizes from
USA Medical and Surgical Supplies
AMD American Medical Depot
Optimusdentalsupply.com, Availability:14-21 Days
Amazon sells Sterilization Wrap, altough not Halyard wrap, which is sold out on Amazon. Also, although the name is called sterillization wrap, many of them are non-sterile.
Medline also sells 2 Ply bonded sterilization Wrap