I have a few 1 gallon cherimoya knight grafted on cherimoya rootstock for sale. 20$ plus shipping. They are very small trees so I can ship them. Knight is a top quality fruit, possibly the same as pierce. Its from the same original ranch for sure. The bud wood came off my knight tree that makes exceptional 30+ brix fruit. This is the best annona I have had easily.
Will post pics of the trees later but they are about 1ft or 18" tall and grafts are just starting to grow leaf sets. I can hold them for a few weeks to let more leaves come in if you want.