Was at Morley yesterday and they had a pretty nice assortment of rainbows in.
I saw boesmani, praecox, glossolepis incisus (red rainbow) lacustris ( Lake Kutubu rainbow), Goyder River trifasciata, chilatherina bleheri, and melanotaenia parkinsoni, among others.
I was pretty happy with the Parkinsoni in particular, as I have not seen any in a while and took a couple home with me.
So just a heads-up if you are looking, as some of these can be tricky to find.
Rob's Aquariums also had a tank full of Boesmani.