The 302 in that question was a Super Lusso which has extra fancy engraving, gold trigger, safety, and other pieces, and high-grade wood.
Do you know where I could get a new one?
Not literally new, because they haven't been made in 20 years. Guns that old do show up in NIB condition now and then, but it would be hard to find one. Used ones are not real rare. Like I said, my local shop has one on the rack for somewhere around $500, but it is a trap gun with a Monte Carlo stock.
Just out of curiosity, why are you particularly looking for a 302, as opposed to a 301 or 303? I ask because I am interested in the features of the different models in the 300 series. I am doing research for a paper on the history of the series.