Please help me find this part:

http://reviews.mtbr.com/wp-content/uplo ... nc_pin.jpg

So I'm venturing myself to build my own Seatpost, I already have pair of Ti bolts/ home made carbon cradle/Carbon tube its in the mail, Yokes I know were to find...but this little guy I just can't find anywhere! perhaps I'm using the wrong therm to search for? is there another name for this? (I'm not originally from the US).
I found on r2bike: http://r2-bike.com/ax-lightness-Sattelstuetze-europa-5

....but I'm not spending $40 plus on this!

I'm looking for ebay/cheap parts, 3 days to be at my door (if possible)


Any clue?

Any help is much appreciated!

Anyone?!?!?!