Harpeleik Zither Chord Improv

Here is the Harp Zither by itself, just playing with some chord changes put to rhythm, using hammered dulcimer hammers - my own variation on playing this usually strummed instrument from Sweden. The designation on the instrument box itself is "Harpeleik Zither" which translates according to Google as "Harp-play Zither." The label inside the sound hole says "Valsonora Zither." There are eight chords of 9 strings each with the C chord having a tenth string for whatever reason. The chords going from left to right are:
Bm, Em, C, G, D, A, E, B.

[@agatagalewska576]

Hello. I Have just bought beautifull zither similar to this one. But I need to change the strings. Where I can buy them. Can you help? Thank You
Best Agata

[@h.wagner]

You might try calling Schreiber Autoharps. They make custom strings for numerous models of zither-like instruments. Example - I needed strings for a 136 year old autoharp. They had them, in stock.

[@leokretzner1977]

As already suggested, going through an autoharp maker is a good idea. Both instruments (and zithers generally) include strings far heavier than on the guitar, piano strings essentially.
However, how bad are your strings and do they really need changing? The strings on mine are very old looking but tuned up quite well. Zither strings don't age nearly as much as on instruments like guitar where the strings are extensively fingered.
Changing the strings will be an epic job, perhaps find a luthier or stringed instrument person to help with it!
Good luck with your instrument whatever you decide to do!
Leo K