i think wildlife of fauna n flora put a restriction on exporting black aro's from their native country at a size too small...i dont think u'll find any near 4'' but maybe 6''
last time i seen a 2-3'' black aro for sale with yolk was when i was a kid...back like 9 yrs ago.... i bought some then...grew big and gave it away. ever since i never seen any under 10''. and all going for 250$USD+
Just a heads up your silver aro and if you buy a small black will be well over 2ft. when you dat hits 5" so he might end up being a meal. Your lucky to get 2" a year of growth on dats. I've seen your 2" dat where's the pic of the 5" guy?