Jo,
I am virtually positive that your male is a Cza, but if it would put your mind at ease you can try checking with Sherri. I think I cc:ed her on some previous e-mails I sent you. If not, let me know and I'll send you her e-mail address offline. Note that Paulo in France has a female -- maybe you and he can work something out? I think your male may be elderly, however, just from his face (which could also explain his docile personality). Also, my Cza male is smaller than my female as well, but has all the other classic features. I just bought a food scale this weekend, and will try to get some weights on them all soon.
Kisha's female looks to me like she *could* be an intergrade -- she appears to have the 50 degree stripes, but not the black sclera. Is she unusually large? My Cza females have the same "dingy" sort of coloration (the males are much more colorful). But the black sclera are a definitive feature, and the one in the picture doesn't appear to have them. (Note that the eyes don't have to be totally dark, just the sclera -- I just got a rescue skink which I am pretty sure is a Cza male, and his eyes are green with dark grey sclera -- if he survives, I'll try to post some pictures of him).
I have a young female I also believe is an intergrade (Cza father/Czz mother), just based on her coloration and on some comments the breeder made to me when I bought her. He said the father "had a lot of blue" and was "extremely aggressive". At the time, I didn't know anything about Cza's. (Unfortunately, he has long since sold the father).
And I *think* Paulo in France said he bred his Cza female and a Czz male, because he didn't realize they were separate subspecies. So it *appears* to be possible to cross them. But it would be a shame not to keep the subspecies pure, especially considering how few pure Cza's are known in the captive U.S. population. Aside from Sherri's 9, and however many Kisha has, I have 5 (three males and two very elderly females, one of whom I am pretty sure is well past breeding age); there's one (probable male) in a zoo north of here; one male in a privately owned group in Ohio and one male in Illinois or Missouri (I think -- I am in e-mail contact with the owners, but don't recall off the top of my head what states they are in). Which reminds me, I think the fellow in Ohio bred his Cza male with a Czz female as well. That would make another case of cross-breeding.
I have yet to find any other pure Cza females of breeding age in the U.S. (And believe me, I have been looking!)
-- Celeste