[@robkk Moderator 11 years, 6 months ago]

bbPress doesnt have themes anymore , it just uses WordPress ones.

you can customize it yourself to look kind of like that though , either following this

codex.bbpress.org/bbpress-styling-crib/

or using this plugin https://wordpress.org/plugins/bbp-style-pack/

you can also post a job at http://jobs.wordpress.net/ and hire a developer to develop this for you.