I am just now finding your wonderful multi-part post. You organized the history in a very easy-to-follow manner with beautiful photographs.
I thank you for taking the time to write it up and share it with us.
There is a seller on E-Bay "krishnapens" ; could that be from the Krishna Optical and Pens store? All of their pens have the word "Kim" in the name.
I know I'm five years too late, but no. I don't think so. Krishna pens- tbf, it's more popular as Krishna Inks- is run by Dr. Sreekumar. You may have seen quite a few reviews of his inks.
He does refer to Mr. Ramachandran of Calicut Pens as his teacher.