No reputable breeder will sell you fertile eggs or unweaned chicks. Parrot eggs are delicate and cannot travel without damaging or killing the embryo.
Hand raising a chick from day 1 is not in the chick's best interest. They require a lot of round-the-clock care, and a hand reared baby will miss out on essential probiotics and other good stuff from their parents' crops which means that they are likely to be more fragile. It is very easy for hand feeding to go wrong, especially with someone who has never done it before: if the formula is too hot it will burn the crop, if it's too cold it won't be digested and can lead to yeast and bacterial infections, if it's too thin it won't provide enough nutrition, too thick and it's hard to digest and will cause dehydration... The brooder temperature and humidity must be exactly right to avoid damaging the chick. Sadly, we get a lot of posts here about someone buying an unweaned chick and it often doesn't go well for the chick.
Young parrots really benefit from socialisation with other parrots and generally learning how to be a bird. A chick that's bonded to humans sounds cute, but is actually terrible for their mental and physical health when they reach puberty and seek out a mate.
Basically, you can't find anyone legit willing to sell you eggs or very young chicks because it's not something any reputable breeder will do. If you're interested in getting a parrot, you would be better off getting an older bird that's gone through puberty and is likely to be steadier, or, if you must have a young bird, getting a fully-weaned youngster that has been raised by their parents for at least the first weeks, abundance weaned and has spent time with their clutchmates.