Lightweight aero seatmast topper

[FastforaSlowGuy]

My bike comes stock with this thing, which must be filled with lead:
http://www.fullspeedahead.com/products/ ... d-Seatpost" onclick="window.open(this.href);return false;

It seems like an easy target for weight savings, BUT I cannot seem to find anyone else who makes this shape topper in something carbon/alu. Thoughts? If no other toppers are available in this shape, are there part swaps I could do to lighten it up?

[kode54]

looks similar to one that fits on the Litespeed CR series. don't know of any replacements that are lighter.

[FastforaSlowGuy]

Bummer. Seems at least 100g heavier than others on the market.