Also check Darkdrone's Temporal Starships out. I have the Federation Fairchild Class Nebula variant, and the Klingon Temporal Sukoy Class BOP variant. Both have Temporal weapons, torpedoes and cloak included.

Do you have a URL for these ships, I've just checked Unimatrix One for them and haven't seen them. Any ideas as to where they may be?

They are in the ModPacks. Number(3) I believe. They use to be available for individual download. But not since the site had been updated. The old site looked much better than the current one in my opinion.