Didn't bother emailing them - I've had issues with other sellers on ebay before and found the PayPal resolution pretty good, so just waited until it turned up or not, as the case may be.
Looks fine on the bike, and you're right - you wouldn't be able to tell the difference, especially with a corse sticker on it!
I can take some pics if you like, but I wouldn't worry, just wait until it turns up.
The websites on the invoice are:
http://www.opeak.com/ http://www.carbon-edge.com/ http://www.o-racing.com/