Help in finding a Virtual Rack software

I am organizing sex different 19-inch racks with servers and stuff.

I know there are special applications for this, but I can't find any for Mac OS X.

Ie, I want an application that creates the rack virtually, and I can fill it with different U-sized things, with name, description, IP etc.

I know, it's doable in a lot of applications. I think though that a dedicated app shurely must be the best alternative.

Any suggestions?

Thanks,
/andreas