[img] 
[/img]
Its the bearing race on the right. Badly corroded and goosed in my opinion but can't find identical one. Any help appreciated.
I once used the bearings from a superstar headset to replace the Crane Creek bearings worked a beaut
IIRC superstar sell the bearings nowadays
Seem to remember hope headset bearings fit can creek headsets as well.
Where's the rest of the bearing? That looks like a cartridge that's come apart.
http://www.canecreek.com/tech-headsets?view=standards
More than likely the same as the top one, you need Outside Dia, Inside Dia and the "Angle" of the bearing edge's
Also Blue seals are normally 36deg and 45deg bearing and Normally crane and creek
Yellow seal normally 45deg 45deg
You need to find someone with one of these!
http://www.fullspeedahead.com/products/419/HEADTUBE-GUIDE
Which bike is it? Is the stem a 1.5"or 1-1/8"? Is it a Cannondale? If it is might be worth checking out these guys. www.qwertycycles.co.uk UK based website for Cannondale spare parts. They have a couple of headsets on there which might fit the bill.