The "original" cantina is the one that Vossk stands in front of. We suspect that for E3 they didn't have the actual cantina module built so they just slapped together a quick model in the module they did have, 301, the module you enter off the hawk, or, they were ready to test stuff and the cantina module wasn't ready so they slapped one into 301. Either theory is supported by the fact that all of the cantina dialogs and scripts present in the current cantina module are also present in 301. There is nothing to restore here as there is no dialog that didn't get transferred to the cantina module.
The colony was an M4-78 thing.