duckbill or drain valve for air box?

[wandererr]

Got a snorkel on my JK that uses the stock aribox and after sealing the stock drain holes I need to install some sort of duck bill or a drain valve.... any recommendations as to an inexpensive one (preferably Amazon sold ) ?

Thanks

 

[wandererr]

I started looking and got..... lost...... I keep finding interesting parts... but no duckbill drains....