AFAIK, no one makes a 3.00 crank for the SBM. It could be made easy enough if you really wanted to have one. It will get expensive not to mention the custom pistons that need to be thought out a good bit before you take a step towards building anything.
It’s just money and lots of it.
Below is the Winberg web page for small MoPars. Most use a Ford 302 main bearing.
Dodge Small Block | Winberg Crankshafts
