Unfortunatly most Eastern Newt young go through a terrestrial eft stage. A small completely aquatic life cycle animal easily avaialable for purchase....I can't think of any to be honest. THere is one subspecies of Easterns that usually skips the eft stage and remains always aquatic though.
Go to http://www.caudata.org and ask on the forums...someone there may be able to even help you find some for sale through private breeders. You can also read up their caresheet on http://www.caudate.org/caudatecentral/ so you know exactly what they would need.
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Hope my opinions help,
Rob