I’ve never seen a Twin Reverb clone. Assuming you would build the AB 763 circuit (black face, 60’s style), finding a chassis and cabinet would be a challenge. Maybe finding a Twin Reverb Reissue cheap and changing out the PC board for a fiber board / point to point circuit would be way to go. It would be powerful and have that 6L6 Fender clean, is that what you are going for?

Most of the clones I see these days are Dumble, Trainwreck, Matchless, Marshall or Vox.
Have you been to the Amp Garage website(ampgarage.com)?