I'm a writer whose penning a fiction piece on Indian Home Guard. I too am seeking information for authenticity. In Redlands, CA. there is the Lincoln Memorial, which has pictures and tidbits of information on display regarding Indian Home Guard. There's also the Smiley Library, which may have some information available.
Don't know if this helps. Perhaps we can exchange information.
Thanks, and good luck!
Joe Nelson
Redlands, CA.