They are hard to find. I wanted some earlier this year but settled with blue and black. You can sometimes get a splash when hatching blues, but I was't that lucky. Even if you have splash birds, you may or may not get splash babies. At least that is my understanding of it. I could be wrong though. I hope somebody has some eggs for you.
We have some blue to black babies coming soon and if you breed blue to blue you get 50% blue 25% black and 25% splash so I think there is a breeder who might get splash I forget his name though
theres somebody down here in FLA that has an online ad for some Splash and blue jersey giant cockerels and pullets might try contacing them see what they got look here you will see there ad