Marusan Hashimoto guqin silk strings are available at this online store:
They have assigned a dedicated sales rep to handle orders and price inquires in Chinese-language and English. Name: W. Chen [ w.chen (at) ise-jp.com ] You can also Cc to [ hidekazu (at) marusan-hashimoto.com ] No, I did not ask about the price as I am still very happy about my Tobaya strings. Hope this is useful to you! ^_^
I have not tried these silk strings before. What do you think of them? If you have tried them before, please leave a comment to share your thoughts? Thanks!