Hornady produces it:
http://www.ableammo.com/catalog/product_info.php?products_id=99099

Joe at the drilling hotline has some S&B, also some Hornady dangerous game.
http://www.drillinghotline.com/index.shtml

The 9.3x74R is capable of taking elephant. However, in many African countries it is not legal to do so. The 375 H&H is the legal minimum for dangerous game.

I have a 357 H&H Ackley Improved in a custom Mauser. It was intended for Brown Bear, but that is not going to happen any time soon, if ever.

For many the double rifles the 9.3 is the best choice.

The Ruger is around
http://www.gunbroker.com/Auction/ViewItem.aspx?Item=223879944

Pete