The BennVenn LCD kit for Atari Lynx has been really groundbreaking and popular, with many revisions released, each improving things more and more. The latest revision (rev6 - install guide here) added adjustment to screen brightness via the Lynx brightness wheel. Now there's a revision of the kit that has brightness wheel control and works with the C104129-001 Lynx 2 motherboard.
Here's a little bit from BennVenn...
Revision 6! With brightness control using the original Contrast wheel! This version requires one wire to be soldered to be compatible with the -001 motherboard. Solder RES pad to TP27.
You can buy the kit here - LYNX II DROP IN LCD KIT - (MOTHERBOARD REVISION C104129-001)