ladyT, welcome, thank you for your service, and I feel your pain. Older S&W revolvers, in decent, not even good condition, are hard to find in my area. Different parts of the country seem to have more of certain models than other parts of the country. To find older S&W revolvers, takes time, patience and a willingness to buy when you find one. I will tell you where I look, LGS, Pawn shops, S&W Forum, local gun sites, internet auction sites (be careful here), and I tell everyone who will listen that I am a S&W revolver fan. Post a WTB (want to buy) here on our site. I guess what I am trying to say, look under every rock. The hunt is sometimes more fun than the purchase. Just my opinion, but I do not believe there is just ONE place to look. Good older S&W revolvers are out there and at decent prices. At least that is what I keep telling myself.
Good luck finding what you want.