We used a lot of 2 cycle Detroit Diesels in our Terex construction equipment in California up until about 2006. We were forced to retrofit to 4 stroke power mostly because those engines leak so much. They are actually designed to leak from the air box tubes. We did government bid jobs that actually came with "leak inspectors".
Many will argue that the leaks can be cured but keeping up with them just wasn't cost effective from a maintenance standpoint.
You might still find willing buyers in the earth moving business yet though if they do "private" jobs that aren't so closely scrutinized.
But, realistically, the "phase out" has been going on for over ten years now and there is just less demand. On the other hand, because they are getting more and more scarce, you find the outfit that NEEDS them they will be happy to hear from you and probably won't blink at shipping charges.
I'm thinking Alaska might be a good advertising target.
Good luck.