I was just told by S&W this week that they're finally out of the 5900-series grips, but it can't hurt to give them a call and ask about the 2nd gen grips for your pistol. Who knows, you might get lucky.
BTW, the first pistol I ever bought was a 469. I got it NIB at a gunshow soon after getting out of the Marines back in '85. It was a great little pistol, but not long after, I traded it in on a Sig P226. They apologetically offered me "only" $250 for it, without knowing I actually paid $249 total, with a box of Blazers tossed in !!!