I was scouring several sites for iPad pros earlier today but could only find it in white - then came across this site called Jigsaw24 - checked into it and they seem to be legit - they have iPad pros still available with most popular 128GB in black with £20 off for black Friday still
http://www.jigsaw24.com/apple-ipad-pro-128gb-wifi---space-grey//-/fcp-product/25636
http://www.jigsaw24.com/apple-ipad-pro-128gb-wifi---space-grey//-/fcp-product/25636