You can use 4600 series materials for this application. It probably will suit it.
A supplier by the name of Quebec Metal Powders (QMP) could answer most of your questions.
I know a gentleman by the name of Joel Poirier that could direct you to the pertinent technical person...
For replacement parts or assistance on this equipment outside of Japan you can still contact CI Hayes in Rhode Island (attn Mr. Peter Parker tel: +1-401-467-5200, or www.cihayes.com)