The best anatomical models I have seen come from the following
    source:

    Anatomical Chart Co.
    Anatomical Products Catalog
    8221 Kimball Avenue
    Skokie, IL 60076-2956

    1-800-621-7500

    They are plastic, not was (which hasn't been used to make
    anatomical models for fifty years).  These models are wonderful,
    but expensive.
                     Hope this helps.
                     John Handley