this is probably not much help
that url is to Axeman's site. he's a member here, you can send him a PM and ask him if you can "Unkitbash" The Yacht or if he has the orginal he will let you use. He's really friendly.
As for getting a mesh for the Korelev or getting someone to make it for you, thats gonna be difficult.
Oh to those of you who would like to help sinclair, the Trekships site dont alloe hotlinks, just type in Trekships.com or org or whatever into your browser and click Korelev to see what Sinclair is talking about. There are variations of the ship. The Variation Sinclair wants only has a side view available. But i thought maybe any of you wanting to make this mesh could make it combining the views of other variations with the side view picture to at least get something that looks decent enough for him to use.
If you eliminate the impossible, whatever remains, however improbable, must be the truth- Sherlock Holmes