Alliance Models makes a 1/1400 Ent-E in resin, available at www.federationmodels.com
Unfortunately it costs $95 :(. But Tracy MIGHT have an Ertl E in his styrene kits section if you check.
J-Hulk, 'twas Ertl made the E :). Revell/Monogram only had the license for Voyager. Both companies let it lapse. As for who's got the license now - Polar Lights is the only U.S. styrene kitmaker with a current Star Trek License. Bandai has the Japanese license.
PL promises some great stuff, starting with the 1/1000 TOS E in July.