Q for the headset experts - 44m ID x 9mm depth

[gbug]

I recently purchased a Chinese carbon frame, and rather than going with a generic chinese headset, I figured I'd show my LBS some love and order a Cane Creek or the equivalent through them.

I took the frame into the shop today, and after measuring it, they said that there are no headsets available to fit my frame (other than the Chinese option). The internal diameter is 44m, and the cup depth is 9mm. Fork is 1 1/8 straight steerer.

Why wouldn't something like the CC ZS44 work? Is it because the top cover stack height is 8mm rather than 9mm?

Cane Creek 40 Series Zero Stack 1-1/8" Threadless Straight 44mm Black ZS44/28.6|ZS44/30 Headset from ModernBike.com

Are there any headsets out there that will work? I'd rather not wait two weeks to get a cheapy from China.

[gbug]

Bump...may have found an option that will work.

WCS Ritchey Headset Bearing Unit Alloy SEALED 44mm Black New Save £46 | eBay

Can anyone confirm that the Ritchey WCS is indeed compatible?