Got to agree with Darryl & Eaustin on this one!
I don't think there is a good substitute for real jungle cock eyes. If you really need a couple, buy them in a small package. I bought two full jungle cock necks on eBay a couple of years ago at a very reasonable price (less than $40). I use real feathers on display flies and generally leave them off fishing flies. Just my 2% of a dollar. 8T :)
No Sub Fer The Real McCoy !!!
I agree !!! There is no good substitute. Ya just need to bite the bullet and get the real stuff. I do have a catalog somewhere in my pile of mags, books, etc that has Jungle Cock where you can get select packages of ten or so nails specified by hook size (if you don't want to have to expend for the whole deal) !!! Let me hunt that catalog up, and I will give out the info.
Outlet for real Jungle Cock Nails !!!
Go to Stone River Outfitters. You can not only buy Full or half capes, but also packs of 10 select nails (an inexpensive way of doing this) specified to hook size. They do show the selection in their catalog or you can go online. As I said before, there is no substitute for the real McCoy !!!!!