Dr. M said:
Knowing a great deal about molecular biology and biochemistry as it pertains to overexpression and purification for something like hGH (I'm a grad student in biochemistry), as well as the stability of hGH at room temperature for long periods of time during shipping (or improper storage!), I can unequivocally say that no underground labs in Canada or anywhere else would be able to produce hGH of any suitable quality.
You need to clone in the gene, overexpress the protein, purify the expressed protein in a non-denaturing fashion, dialyze away salts and buffers, assay for protein content, aliquot it into ampoules and lyophylize (freeze-dry) it, aliquot separate ampoules of suitable sample buffer for resuspension, seal everything and all the while maintain sterility and high throughput.
-M