Careful. The scripts that are being sold around here are generally poorly coded. Not something you want when running a dice site. Expect tons of bugs and a backdoor or two
Do you know any place where I can buy trusted scripts?
Not for something like this. You're best having one custom coded, though that can be quite expensive.
Whatever you do, stay away from the dice site scripts that are being sold or given away for free here. Others have ran into my many problems.