First of all the stock units only come in these specs:
medium density
freestyle
crown
graduated (but not scalloped which is a zig zag pattern) front
6" hair length

All stock units on hand are Super Fine Swiss Lace but I can also get artificial skin (PSB) stock units in just a couple of days. Gray on stock units come in increments of 10% so the colors that you specify are available. I'll be in the office on Monday on Monday and check my stock. If I don't have it I'll get in a couple of days.
Regards,
John