Something more like this maybe?
The best detail brushes for miniatures are Kolinsky Sable hair paint brushes
I haven't used these, but this looks like a good deal with good reviews if you are looking for the cheapest option.
Winsor and Newton is a more well known option, but much more expensive.
If you aren't locked in to Amazon only, Blick Art Supplies is a good option for brushes.
Make sure you practice proper brush care.