Pretty Pastel Rainbow Cake

When I made my first order of paints I made a rainbow cake of aqua, light blue, lavender and pink. The little girls love this for butterflies and I use it for a base for my dragonfly mask. Which means I am starting to run low. I don't want to buy 4 cakes of paint. Money is a bit tight with the dog needing surgery and paying for summer camp.
Anyone know of someone that has a similar rainbow cake? I don't want any white in it, because I use the white for line work on the little girls and it needs to show up.

Prisma Twiss is similar...you can just use their white on the outer edge for linework...

I really don't like the yellow in it. I might have to just make myself another one.