This site is exhaustively and entirely devoted to just exactly what you’d think it is.
It goes without saying that there are more photos than you can shake a bantha at, along with a fan art gallery. If some of the images were NSFW, I would not be particularly surprised.
There are links to tutorials for making a bikini of your very own, as well as to sites where you can purchase one ready-made. There’s a Coming Soon link for LMB “merchandise,” although I don’t know if that will be T-shirts or action figures or what.
This site is definitely a one-stop shop for all of your Leia’s metal bikini needs.