Artifact download by build number, not build id?

Hi,

I'd like to download all of the artifacts from a build in a zip using the build number of a particular build configuration, not the internal build id.

This URL works if I know the build id:

http://teamcity.corp.netfile.com/repository/downloadAll/bt55/6941:id/artifacts.zip

...but I rather do something like this if I know I want to get build number 360 of configuration 'bt55':

http://teamcity.corp.netfile.com/repository/downloadAll/bt55/360:number/artifacts.zip

If I want to download artifacts by build number, it seems I need to download the artifacts one at a time after fetching/reading a manifest document.

Maybe I could side-step this problem if there is a way to use the REST API to get the build id if I provide the build configuration id and build number?

Any advice would be appreciated.

Thanks,

David Montgomery