where's a good place to have a nice silk/satin tank top?

Hi all!

I'm currently planning for a super tiny intimate casual wedding for next year. I'm doing this look, and I'll be buying the skirt at BHLDN as that's where it's from, but I'm not sure where's a good place for a silk/satin top. I know BHLDN has a similar top but it's $160, and the top by the same designer who did the skirt is currently OOO in my size and will not be available again until next year when it's super close to the wedding itself. Can anyone please point me to the right direction on where to find a similar top? I'm looking for something that's nice slightly loose fit (where it gives off that nice casual look but it's not lose in the armpit area or cuts too low; I'm a narrow petite girl). Here's another reference pic.

thanks!