I'm glad this popped back to the top - had forgotten where Bill had posted Lauren's drawing of Ariadne - it's a real pleasure to see it again.
Dianne, excellent casts can be purchased from
Guist Gallery online.
Most academies start all students - no matter what experience level - with two-dimensional copies - the Bargue drawings are compiled in an excellent book by Gerald Ackerman, the "Charles Bargue Drawing Course." This establishes a common language for critiquing the work based on absolute observation.
Enjoy your studies!