No. You can get a Sig P229 that will fire .357 Sig, but that is not the same as .357 magnum.
SiG P229 in 357
Sig Sauer P229, .357 Sig
Sig Sauer P229 and P239 chambered in .40 S&W. Here's the press release from Sig.
100-300 USD
Yes
50-250
No
Only the Coonan Arms .357 and .357 models of the Desert Eagle can do this.
50-300 USD or so
You can shoot them in a .357 Magnum revolver, but that's about it.
No
Yes.. offhand, I know of two. Magnum Research made the Desert Eagle available in .357 Magnum, and Coonan Arms manufactured a semi-auto .357 Magnum, based on the M1911 pattern pistols.