Installing Urinal Dividers

Urinal Dividers are a big issue in my school, and I wanted to get them installed as a surprise coming back from winter break. I was wondering about how much the job would cost without having to move any urinals and rearange plumbing. Also if there are any important codes relating to material, spacing, size, etc.

There are 6 urinals (5 dividers) approximately 4 inches apart.

Is there any other information I would need to know to make an informed desicion about contractors?