Sims confess to not knowing but think the maker might be Gotoh.
Stew-Mac are positively obstructive and infuriating - they say "Richard, Thank you for contacting us. Unfortunately, we are not able to provide contact information for our suppliers, as they typically do not deal directly to the public. I am sorry we could not be more helpful.
If you have any other questions or comments, please contact us.
Best regards,
Christine McMillian Customer Service"
I am tempted to ask her if she knows what "Customer Service" actually is.