I wore this lovely jumpsuit to a wedding about 3 weeks ago and have gotten quite a few questions about where I got it. I got it from a boutique about a year ago and it's no longer available but I went ahead and found a couple of similar options...
The closest to this color I found was this this mustard long sleeve version from Missguided for $67, it also comes in other colors. Another close color is this yellow jumpsuit from Red dress boutique for $46. I've never bought anything from there before but it doesn't look dodgy. Still in the same color family, NY&Co has a plush velvet jumpsuit as well for $89.95, and Asos has an orange wrap front slim leg option from for $60.
If you don't mind straying away from this color, there's a very similar halter option in ivory option at Anthropologie for $280. Also, Lulus has a backless style that comes in black, cobalt blue and red, for $49.
I added the necklace to add a touch of glam to the outfit. I got this necklace a few months ago from Aldo on sale for about $40. It is still available at its original price of $65.