Lighter seat post option for emonda sl6?

[Geodroid]

i got the emonda sl6 and it has a proprietary bontrager carbon seat mast. Which is cool but Im just wondering is there any other option or is that the only seat post I can use?

[moyboy]

That's about it. it's a cap basically. You can get a SLR 10 seat mast i think that's lighter by a little bit.