What happened to the .357 Puma/Rossi leverguns?

You can still buy new Rossi M92 rifles in .357.

http://www.rossiusa.com/product-details.cfm?id=183&

The calibers available are in the description.

I bought one last year.

Davidson's still lists the 16" round barrel .357 in both standard and large loop, but neither are in stock.

Puma was the brand name for the version sold by Legacy Sports. They used the Puma name for Rossi 1892s and more recently Chiappa-built 1892s.

They are now called Rossi R92. Got two...both stainless, with 16-1/2" barrels, one is a 357 magnum, the other is a 44 magnum. I made two modifications: replaced the rear sights with a Skinner barrel mount rear sight on both, and added leather lever wraps, one shade for the 357, a darker one for the 44 so I can tell which is which at a glance.

They are still out there, a good dealer can locate one.

Back sight: http://www.skinnersights.com/rossi_firearms_23.html

The 357s always seem scarce, I got tired of looking and bought a 44 mag instead

I bought a 16 inch barreled .357 rossi 4 years ago brand new. The gun shop ordered it for me. I love it. It is like an oversized pistol.