Jocelyn, As it has been mentioned most of the stakes are "homemade"
and hammers redesigned. I made my first raising hammer by grinding
down the head on a cheap ball peen hammer.
Anyway what I am trying to say is that most silversmiths have the
talent and tools to do a lot of fabrication on their hammers and
stakes. Therefore invest more into a good bench grinder, one inch
belt sander, files, disc sander, and a seven inch or 41/2 inch
grinder. Most silversmith books talk about the silversmiths making
that special hammer or stake from wood or metal. Even when you buy
new hammers general you change the face some and on a regular
maintenance schedule polish the faces. I just made a large stake from
a truck axle for $150, that would cost $390 new. If it wasn’t for
making the tools I probably wouldn’t even enjoy silversmithing.