I’ve recently acquired a YYF Mighty Flea in a trade with my brother, and I really like it (surprisingly) however, the only string it has is the one that was already on it, some ordinary YYF Mighty Flea String, and my brother doesn’t have any more Flea String, so I figured I’d ask if any of you know of a good alternative, thanks!
My first thought would be to try the “normal” or “slim” variants of the various bulk strings available. After that I would try contacting some boutique string makers since they’ll be much more likely to customize something for you. @MattB and Zipline might be able to help you out, and I’m sure there ar some smaller brands I’m not aware of that can help you as well.
Zipline already makes microline which is incredibly thin. I have some more my knuckleyo which I still can’t really get to work well but that’s not the strings fault.