Well that sort of worked out.
The guy in Bangkok is Montri and his phone # is 085-442-6867. He only speaks Thai, so maybe have your favorite Thai restaurant waitress help you out if needed.
The new tires are "Lion Head" brand and apparently made in Thailand. They are marked 26 x 1-1/2 but did replace the old "Shinko Golden Boy" Chinese brand which are marked 26 x 1-3/8.

Thanks for everybody's help,
Ken