I have some very sad news. Agreman Gimp is no longer.
A friend reached out to see where I was buying my gimp these days. I had stocked up a while ago so hadn’t bought any in a while. I once did a group buy of gimp for people so since I figured I would reach out to Gutermann to buy some boxes and set up a little web store in the US to distribute it. I was told IT HAS BEEN DISCONTINUED!
I knew of a company in Italy that made (or perhaps rebranded and sold) the gimp and they, too, told me that their product had been discontinued.
So if anybody knows of any company anywhere in the world that still makes a decent buttonhole gimp, do let me know, If need be I will buy it in bulk and resell it to tailors around the world.
EDIT- I am grateful for the readers who have posted links to sites selling what remains of the Agreman gimp in Europe so anybody who needs some can stock up before it is gone! I am still looking for a manufacturer of gimp for future orders once those stocks have been depleted. I hope I can find some!