Want to lower my stem - what part do I need? (See photo)

I have a Quintana Roo Seduza and have dropped the stem down to the conical part/spacer just above the head tube, as shown in the photo below. I am told I can get a replacement part that would be even shorter to allow me to drop the stem down even more. What part am I looking for? What is that conical piece called?

Thanks.

http://www.backcountry.com/images/items/detail_large/QNR/QNR0025/RAW_D1.jpg

This should work and is a lot lower. Might be just want you are looking for.

http://www.ebay.com/itm/NEW-FSA-Orbit-CF-Carbon-Fiber-Top-Cover-w-Cup-Headset-/350503450106?pt=LH_DefaultDomain_0&hash=item519ba235fa

Thanks! I also found this on FSA’s webstore site: http://webstore.fullspeedahead.com/fly.aspx?layout=estoreproduct&taxid=233&pid=837

Just have to figure out which one works best for your application.