I would have never thought of that, but a zoo probably would be able to help you, as long as it was one very familiar with breeding and keeping a large number/kinds of reptiles.
Unfortunately, you may have a hard time finding one that knows anything about the species you are interested in.
Have you tried looking up the information of other Z. lizards and going off of that. Usually animals in the same group are simular in behavior.
ALSO, instead of looking for pet information, look in field guides. They should have something about this lizard in them, as long as you pick one that deals with the right region. The books should mention how they go about reproducing.
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~Sara~
5.5 ball pythons
1.0 Black-lined plated lizard (Lizzy Butt)
0.1 Burmese Python (Pixil)
2.1 Pet Rats
1.1 Dogs (Ozzie and Mandy)
0.1 Cat (Isis)
0.0.1 Synodontis Catfish (Big Spotty Fish)
0.2 Convict Cichlids