I was going to suggest Amidon, but doesn't look like they have the size(s) you
need:

https://www.amidoncorp.com/items/10

N9NEO wrote:

Greetings Earthlings,

I need to get hold of some ferrite rod that is 3/4" or 1" in
diameter. Material must be #61. There is a site called www.stormwise.com
which claims to have the material in 1", but I don't know anything
about them.

Has anybody deal with this company or can offer another source for the
larger dia rod?

Silver is up over 3% today

regards,
Bob
N9NEO