Adding Faucet To Tower?

Not sure if this belongs here or in the equipment topic, but here's my question:

I currently have a tap tower in use that has 1 faucet on it. What I want to do is add another faucet to the same tower (drill a hole through the tower and attach another?)

I was just wondering if anybody has done this and how they did or if it was easy or not. I just don't want to have to buy a brand new tower with 2 faucets if I don't have to.

Any help would be awesome.

Thanks in advance!

I have seen extensions out there just for that.. ill try to see if i can find them...

That's just what I needed. thanks!