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Over at Monsters in Motion, there is a Nostromo model kit that I have never seen before.
Based on these photos, the Nostromo Towing Vehicle Model Resin Kit appears to be very detailed and its proportions closely match those of the 7-foot filming miniature:
It retails for $199.99, which is less expensive than what the Halcyon vinyl/plastic kit is going for on some sites.
There were three kits available as of this posting.
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At first glance, the Nostromo Resin Kit at MIM looks really good but is it available anywhere else? MIM does not have a good reputation and I would never purchasing anything from them again.
I have only seen it at MIM. It appears to be a re-cast of the Halcyon kit. Sorry to hear you had a bad experience with them.