Hi Karen, welcome to the list (from lower NY)!
For lentil beads try:
1205 N. Main St.
Royal Oak, MI 48067
They sell imported gemstone beads (and findings) and seem to have a good
variety in the way of shapes and sizes. Also, if you want to find more
gemstone bead suppliers, try looking in and issue of Rock and Gem
magazine. They have tons of gemstone bead suppliers advertised.