A realistic dice site? You are not looking for a site that is provably fair, legit and offers good service? That is weird. You do know that "looks" are not the only thing that defines a casino, right?
Anyway, the site you mention ended up being a scam. They stopped offering services without any notice and people lost everything they deposited on their site. If you are still looking for a dice with same graphical design and interface, lookup "Rocket Dice" on Bitstarz (another scam site). Play at your own risk over there. Chances are you will lose everything and get scammed by them. Too many scam reports on Bitstarz!

Why not try visiting pocketdice.io and see where it lands you. You might like the dice over there.