Look in your owners manual and find the number for the service center in NH.
Look up the numbers for grip frame, hammer, trigger and the two hex head bolts near the "frame ears."
Get out your credit card, call the number, wait patiently to talk to the lady there, be pleasant while you tell her what you want and hope they are in stock. If they aren't, ask if she has any idea when they will be. Thank her when you're done. They get enough unpleasant customers that a nice guy is a welcome change and they might be inclined to make a "judgement call" in your favor.
I've gotten BISLEY and HUNTER grip frames and other items "supposedly unavailable" or "supposedly restricted" by making the call and being pleasant. One poster here got irrate when I pointed out that "you can catch more flies with honey than vinegar" after he related his bad experience with RUGER service....guilty conscience?...the moderator had to calm him down some. Not trying to insult anyone or step on their toes; just telling what has worked for me everytime.