I use the holster for my innocase clad Treo Pro and it fits well. It fit the Hero in the ebay snap together hard case. The innocase for the Hero is most likely a bit thinner than the cheap china ones so I don't know if it would be wide enough to fit the moment. The Treo Pro is a wide albeit thin phone, so the Moment and Hero fit in the bottom grooves and the spring latch at the top, while not closing all the way, came down enough to really lock in the encased Hero and bare Moment.
Not sure how much that helps you, but in general, those holsters will have some tolerances to them to fit some other phones.