Google/Bing stand alone bass modules you will find a number of them. I have no idea how they sound but they can be quite expensive.

Are you using any backing tracks when you gig? If so how do you play them? MP3? CD?
If you are using prerecorded backing tracks then maybe this will help:

There are a number of free bass VSTis but the best are Ample bass VSTi and in fact Ample basses are my go-to bass sounds. They are expensive but the Ample Bass P lite is excellent and free:

https://www.amplesound.net/en/pro-pd.asp?id=19

With it and BiaB MIDI you can use either the BiaB MIDI track or write your own track. Writing your own tracks is a way to customize the bass line for every song. Plus it would leave you to concentrate on your guitar playing.

When you are at the checkout line and they ask if you found everything say "Why, are you hiding stuff?"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware