I don't know this is right forum to post this or not, if no, Mod please move it to right section.

I am needing building a webmaster forum urgent because I am seeing this niche is more potential to get visitors and buyers.

The first thing come to me is finding a suitable theme for my new site, I found one and it looks awesome.
that's this site http://www.webmastersun.com/
I want to have a same theme like theirs but I don't know which forum cms or template they are using.
I tried to find the theme through theme marketplaces as themeforest or templatemonster but not succeeded.

Any one advise me?

Thanks in advance.
Harry P.