i use the leather material myself and change the settings heres i one that may be ok.

Choose leather material the change:

Cell Color to white
Crease color to black
Cell size to 0.33
Density to 0.198
spottyness to 1.000
randomness to 1.000
threshold to 0.830

this should give you a start, just play around and see how it turns out.

Cheers

DW