A number of the choir have used Cyberbass in the past for learning files, and they have ones available for Samson here. For advanced users who’d like a different set of MIDI files, there’s another set available here.
If you’d rather have a more polished product, there are files available from Choraline, but this will cost you between £8.99 (to listen online) and £12.99 (to be sent a CD).
There are many recordings of the complete work available online. Click here for a selection.