Planishing Hammer

Hello, I'm new to the forum and want to say HI. I'm in the Utica, New York area. I've been building some small projects, mostly tools (English wheel, stands for shrinker and stretcher and shot bags, etc). I was wondering if anyone could give me an idea about which brand of planishing hammer might be good to purchase. I have seen reference to a Waterveliet (sp?) hammer and I work for someone (part-time) that has one. I was wondering if anyone knew where to get one or maybe a older chicago pneumatic one.

Are there newer ones that are not just a body shop type air hammer mounted in a frame?

Thanks

Mike