If you are really committed to the classic fly patterns that call for Jungle Cock, be prepared to shell out over a $100 or more for a Grade A+ cape, and be comfortable with who you are dealing with. Jungle Cock Capes are graded A, B, C, D.
Grading has to do with the quality and coloration of the nails. The nails (what they call the Jungle Cock hackle) should not have any splits on a grade A or A+.
I normally eye-ball the nails according to my need for a fly pattern, and the hook size and length.
Another bonus by purchasing a Jungle Cock cape, is the Grey hackle that make very nice wings.
All Jungle Cock that is sold is raised commercially, just the same as the hen and rooster capes you purchase.
Parnelli
Otherwise you can purchase the fake Jungle Cock for a lot less that are printed on plastic coated paper, for fishing quail flies! I know there are those that say you can substitute other feathers with some messing around. Bottom Line, if the pattern calls for Jungle Cock, you have to use Jungle Cock for the best results. That is one of the prices of "Dressing Hooks! Look on the bright side, the cost of a Jungle Cock nail is about what you pay for one hook.