Heavy Metal Movie Animation Cels Nude Gloria multi-layer Cels

In late 1981 a limited edition set of 1000 animation cel portfolios from the Heavy Metal movie were sold.  Typically these contained a painted cel from each segment of Heavy Metal, but I recently discovered this set that contains multi-layers of the post-coital nude Gloria reclining in bed smoking a cigarette.
These portfolios are rare enough but a multi-layered cel set is very hard if not impossible to find.