Didn’t someone here ask for the 5mm ones?
https://www.adafruit.com/product/1938
That would be me 
You already have custom made flat ones, you greedy little snot. 
I have the clear one. I havent gotten a chance to really play with it
@Larry1 , how are your custom strings coming along anyway? How’s the cutting going?
I still wish I could find these on aliexpress
Yeah, I’m not seeing them on bulk side Alibaba either.
Looks like Pololu has a 10 pack for $5 http://www.pololu.com/product/2535
Haven’t cut them yet been crazy busy with work and then I took off to EF last minute.
Hoping I can buy a cut tool and make a prototype smarthoop this week.