Replacement Sonus Faber grille strings?


Hi guys, the grille and stand strings on my Sonus Faber Guaneri Evolution speakers are beginning to sag.  While I know its a straight forward task to retension the grille strings, I am just thinking that at some point I will need to replace the strings. The stand strings look a bit more difficult as it will require me to dismantle the stand.  

Of course I have no intention of paying the ridiculous prices SF wants to charge me.  So does anyone know of a source for the string?
tboooe

I am currently successfully restringing my Sonus Faber with the string grills. I am using this elastic cord, https://www.amazon.com/dp/B09TFW5W1C?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1. My initial concern was finding a sewing needle small enough to fit holes in the brackets while having a large enough hole to feed the cord through. I could not thread the needle! However, the cord slips surprisingly easy through the holes! But something I did not anticipate was the tension on the two brackets as i added the elastic cord. I have jury rigged a device to hold the brackets apart while they are jammed into some packing Styrofoam.
Dexter Gordon is assisting in the background!

Hi I have just had my original Sonus Faber Guaneri Homage's restrung. Sonus F in Italy provided the strings for no charge but I paid our local SF dealer to restring them and they did a superb although not cheap job on them.