Magnaflow shows a CA-compliant option for the 62 on their website: #339005 (same PN for left and right). You're replacing both? Or do you have a custom exhaust with just one?
The one that Magnaflow makes for the 60 (it just has one cat) is pretty much the only decent aftermarket option here. I put one on last summer and it works fine.
The difference between the CA-compliant cat and the 49-state cat is supposedly little more than the "CA" stamp on the unit, and a higher price point. You can get someone out of state to get you the cheaper 49-state version(s), or pick one up in NV if you're out that way. But if you're paying someone else to install it/them you run the risk of them not wanting to cooperate. If you do the installation yourself, you run the risk of an overly anal smog tech checking for the CA stamp. In most cases, an independent installer and small-time smog shop won't care. But it's worth thinking about.
I bought my cat thru one of the online sellers that Magnaflow linked to on their site. There are a bunch, and prices were very similar across the board. Pick the one with no sales tax and the best shipping option.