The U.S.S. Salmon was indeed pounded to scrap metal. How she made it home for her final patrol is a miracle. Because of her history she is one of my favorite SH4 boats. I ran an entire career with her.
I located on eBay a matchbook of her. Yes, the sub crews commissioned match books for the several subs (some for post war reunions). I have that matchbook framed and here in my office next to a large B&W framed photo of the U.S.S. Houston and H.M.A.S. Perth. Yeah, I'm an old sentimental fart but those two things always give me a feeling of pride in ours and the Australian Navy.
Cheers, mates.