Legal Exhibit Dividers A-Z or Numbered

Avery offers a wide variety of legal dividers with numbers or letters.  Some sets include a TOC divider.  The tabs are pre-printed on both sides.
https://www.avery.com/products/dividers?filters=type1_Legal%20Dividers
The entire line may not be available at avery.com, so check your other office supply sources for additional items.