Jerry,
Ballistic Products is selling 7 lbs. of ITX shot for $117. It has a g/cc of 10 which is close to lead. It's a soft shot similar to Nice Shot.
http://www.ballisticproducts.com/ITX-Shot-Loading-Manual-2nd-ed/productinfo/00MTX/ Load manual for ITX

But you asked about Nice Shot. Here's a Nice Shot reloading blog:

http://ecotungsten-niceshot.blogspot.com/2007/11/reinventing-lead.html