I don't know whether this site has been mentioned here before: Biblioteca digitale di testi latini tardoantichi:
http://digiliblt.lett.unipmn.it/accesso.php
It's free, though you have to register. I just was looking at Pseudo-Hegesippus and found the pdf easy to search. Many authors and works are not yet included, unfortunately, but they are adding new ones. The project aims to continue the Packard Humanities Institute database into later centuries.