When the part store is out of the rail in the color I want, and the e-mail notification...

When the part store is out of 20mm x 40mm x 500mm vslot rails in black, and I tell it to please notify me when more are available, Notifying me that rails are available when only silver rails are available is not entirely useful. I need two of the black ones for use in the official installation and build guide for my Y axis Taz bed modification instruction pictures.

Thanks,
Tim