wornoutmomto3, alohachickens can answer your questions better than I but I'll give it a shot. The first "Aloha" was a bantam that was some kind of gamebird cross. This bird inspired alohachickens to try to create the American version of the Swedish Flower.
We are using various other crosses to optimize the birds size and structure, increase egg size and productivity, maintain the tendency for broodiness, and create a healthy, dual purpose bird. We have used some Swedish Flower as they became more readily available but found the bird has less spotting than we want, flat chests, a tendency toward cresting, lots of gray in the pullets and are slow to mature. We do not want Alohas to be crested, nor do we want an abundance of gray in our pullets and we want a rounder bird with a single comb with an upright tail. The Swedish, from my experience is not very self protective (I'm sure there must be exceptions) and the Aloha is more predator aware. So while we are trying to create the American answer to the Swedish, we are also trying to build a bird that maintains the consistency of color pattern that is Aloha, rather than a landrace bird that breeds different colors from the same hatch. We want to build a better dual purpose bird that is well suited to confinement or free ranging environments.
Alohachickens will correct me if I have misspoke and also answer your question re: availability of hatching eggs. I don't have any pure Aloha hatching eggs right now as I am working on improving structure and size and am crossing birds.
So happy you are interested and welcome!