One day we’ll all be able to consult the new Glasgow edition of the fragments of the Roman orators (assuming they publish it in a manner that allows for wide access, fingers crossed!). Right now you need a copy of Malcovati, widely available in libraries, but nearly impossible find for purchase. And it wasn’t so great anyway and we’re about to get the Glasgow edition so perhaps no point in hunting it down. (Book hunting? Try here! Best international aggregator of data I know.)
In the meantime, I’m delighted with the digitization of H. Meyer’s earlier edition of the fragments. It often give the basics of what one wants from Malcovati.
Here’s the entry on Laelius’ speech on Roman Religion by way of example.