Keris forum moderator
Join Date: Aug 2006
Location: The Great Midwest
Welcome to the forum Mickey.
I understand that your focus is more on Balinese figural hilts, but i would not dismiss some Javanese hilts from your studies, especially the Buta hilts, many of which display rather clear mudras.
Though i do not own it myself i understand that Karsten Sejr-Jensenīs Kris Disk has a section that analyzes mudra signs as they appear of keris hilts. If you can locate that source it might be a good start for you.