there exotic morphs you never really see them as much as a pastel and all
my brother and dad are working on mating snakes. the pair we have right now is a pastel (M) and a spider (F), though the female is sick right now, and under weight. where planning on getting a pin stripe female to mate this year, and we working on getting our other pinstripe (M) to get wieght and hopefully he could breed by this year too. pinstripes is a BIG advantage in mating snakes, so are spiders. i will probably help out as the little i could do.
also a tip on getting a ivory is yellowbelly x yellowbelly but the female and male don't all ways have to both be yellow bellies, it is just a bigger chance on getting a ivory, less chance if both male and female are not both yellow bellies
a pic of an ivory:
http://pythonregius.com/ivoryballpythons.aspx