If your mod is not publicly available it does not belong on the user made ships list.
If you can't find a download link and you're creating a page for an existing mod, don't link it to the user-made ships list.
The rules have existed since the page has, I'm starting the pruning today, and I am going to keep pruning until I get rid of them. I'm absolutely sick of clicking on a page, finding a mod I want to use, going down to the bottom, and finding no link. Sometimes, this is a mistake, which I can correct with a quick search of freespacemods. Sometimes, the model's just not available. Where I can correct, I will. Where I can't, I'll prune. I have no partcular issue with unreleased ships on the wiki, but they don't belong on that list. However, I also think we need a banner, like the BP and Inferno campaign banners, for ships that aren't publicly available, particularly if said ships use the same style page as is used by the available mods. I'll be making that probably this afternoon.