I would recommend spending a bit of time traveling through AW for profiles that state they offer duos, make a list of them, then reference their reviews on here. For example MissWelshCandice states that she’ll see you and a 3rd person / lady of your choice from AW; and is very well reviewed on here.
Keep in mind that for at least one of them they’re travelling from their usual place, and doing something unusual, so expect it to come at a price.
If you can find two girls that do duos together frequently, the way the Apple sisters used to, then the extra charges might not be too high. There’s a few girls on UKE who do 3somes too, who don’t use AW.