Page 6 of the paper catalog shows in color - yep bocote. To get grey with that much grain you are looking at staining something that is a light base color with good grain. Off the top of my head, the right piece of hickory might work. Just finished my brothers hickory floors and some pieces are very figured. Angle cut charcoal actionwood is a choice but the "grain" is very uniform.
Staining maple lams would work but finding that heavy figured grain in a lighter colored wood is the issue. Birdseye or ambrosia (wormy) might work.