I found the larger ones
https://www.sakuraofamerica.com/new-pigma-micron/
the ones wanted here by the original poster would be .05 size. .01 is good too but a bit scratchy to use on some fabrics to me. I always heat set when dry just to be on the safe side and have signature quilts 20 years old that still look good.
Enjoy using them. Now i'm off to buy the larger one!