4D Reamer Rentals still has the reamer, I believe. But, this might be a good time to think about it. 7 saum brass
has been ridiculously difficult to find at any price.
284 is very close in performance. 284 improved gives the same performance as 7 saum.
And brass is more available, if $1.00 ea. works for you.
7 wsm is a bigger dog and brass is cheaper.
Reloading dies are all the same price, apples to apples.
Long action or short? cartridge length may help you with the final decision.
IMO you will be better served with one of those three choices.
Choices for brass have been Remington 7 saum and Nosler 300 saum, and
Remington seems to have lost interest.
7 wsm or 7 / 300 wsm are my choices for rechambering if saum brass
continues to play hide and seek.. But then I'll have 7 saum dies and 100 brass to get rid of........