Modern Bachata uses a sliding, smooth electric bass (similar to R&B), while Traditional Bachata uses a more plucky acoustic bass.
Try to find "dry" samples (without reverb or delay). It is much easier to make a dry guitar fit your mix using your own plugins than it is to remove someone else’s muddy reverb. Multi-Velocity Hits bachata samples free
: While primarily a subscription service, they have extensive Bachata samples that you can often browse or find individual free-to-download options for. Modern Bachata uses a sliding, smooth electric bass