Since none were available commercially I created a set of Prismacolor pencil swatch color libraries for Procreate on iPad.
These are based on pencil rubbings of each color and converted to RGB. Unfortunately, there is no way to label the specific swatch with the pencil #.
There were a number of colors that simply do not exist in the RGB color gamut and are therefore unable to be reproduce. In total there are 137 pencil colors (I believe. I might be off a couple).
If you have a need for these you can download them from here
I’ll keep the link active for as long as I can.